Gridview Update Through Ajax Works Only The First Time

Hello everyone.

I call controller/create though CHtml::ajaxSubmitButton which updates the grid. Altough the creation takes place every time, only on the first ajax call is the grid updated. What am I doing wrong..?

This is my controller:

public function actionCreate($id)
	{
		$model=new Expenses;

		// Uncomment the following line if AJAX validation is needed
		//$this->performAjaxValidation($model);
                
                if(!isset($model->appartmentBlock_id))
                    $model->appartmentBlock_id = $id;
                
                if(!isset($model->monthAndYear))
                    $model->monthAndYear = date('Y-m');
                
                $firstTime = true;


		if(isset($_POST['Expenses']))
		{
			$model->attributes=$_POST['Expenses'];
                        $model->appartmentBlock_id = $id;
                        if($model->save()){
                            $this->redirect(array('index','appartmentBlock_id'=>$model->appartmentBlock_id));
                        }
                        else{
                            $firstTime = false;
                        }
                }

		$this->render('create',array(
			'model'=>$model,
                        'firstTime'=>$firstTime
		));
	}




public function actionGetRecordDetails($id) {
            //$model = Expenses::model()->findByAttributes(array('id'=>$id)); //findByPK ?
            $model = $this->loadModel($id);
            if($model == Null)
                echo $this->renderPartial('_view', array('model'=>Null), false, false);
            else
                echo $this->renderPartial('_view', array('model'=>$model), false, true);
            Yii::app()->end();
        }
        
        
        public function actionGetNewEmptyRecord($appartmentBlock_id){
            $model = new Expenses();
            $model->unsetAttributes();       
            $model->appartmentBlock_id = $appartmentBlock_id;
            echo $this->renderPartial('_view', array('model'=>$model), false, true);
            Yii::app()->end();
        }

This is my view:

<div>
<table>
<tr>
    <td style="vertical-align: top">
    <div style='height:380px; width:130px;'>
<?php

$expensesViewDetailsLink = CJavaScript::encode($this->createUrl('expenses/getRecordDetails', array('id'=>'')));
$expensesGetNewEmptyRecordLink = CJavaScript::encode($this->createUrl('expenses/getNewEmptyRecord', array('appartmentBlock_id'=>$model->appartmentBlock_id)));
//$emptyExpensesDetails = CJavaScript::encode($this->renderPartial('_view', array('model'=>$model), true));
$expensesUpdateLink = CJavaScript::encode($this->createUrl('expenses/update', array('id'=>'')));
$expensesDeleteLink = CJavaScript::encode($this->createUrl('expenses/delete', array('id'=>'')));


$this->widget('zii.widgets.grid.CGridView', array(
        'id'=>'expenses-grid',
	'dataProvider'=>$model->search(),
        'filter'=>$model,
        //'enablePagination' => false,
        'pager'=>array(
            'class'=>'CLinkPager',
            'header'         => '',
            'firstPageLabel' => '<<',
            'prevPageLabel'  => '<<',// '<img src="'.Html::imageUrl('pagination/left.png').'">',
            'nextPageLabel'  => '>>', //'<img src="'.Html::imageUrl('pagination/right.png').'">',
            'lastPageLabel'  => '>>',
            'cssFile'        => Html::cssUrl('pager.css'),
        ),
        //'afterAjaxUpdate' => 'js:function(id, data) {alert("after");}',
        'summaryText'=>'{start}-{end} / Σύνολο: {count}',
        //'template'=>'{items}{pager}',
        'columns'=>array(
            array(
                'id' => 'selectedIds',
                'class' => 'CCheckBoxColumn'
            ),
            /*array(
                'name'=>'idPlusDate',
                'htmlOptions'=>array('style'=>'width:10px;'),
            ),*/
            array(
                 'name'=>'monthAndYear',
                 'htmlOptions'=>array('style'=>'width:10px;'),
            ),
            /*array(
                'name'=>'informing',
                'htmlOptions'=>array('style'=>'width:45px;'),
            ),*/
            /*
            array(
		'class'=>'CButtonColumn',
                'template'=>'{update}{delete}',
                'deleteConfirmation'=>"js:'Θέλετε σίγουρα να διαγράψετε τα έξοδα '
                    +$(this).parent().parent().text()",
            ),
             */
        ),
        'selectionChanged'=>'function(id){
                if($.fn.yiiGridView.getSelection(id) > 0){
                   $("#expensesUpdateButton").prop("disabled", false);
                   $("#expensesUpdateButton").parent().attr({
                        href: '. $expensesUpdateLink .'+$.fn.yiiGridView.getSelection(id)
                   });
                   $.ajax({
                        url: '.$expensesViewDetailsLink.'+$.fn.yiiGridView.getSelection(id),
                        cache: false,
                        success: function(html){$("#expensesDetails").html(html);}
                   });
                   $("#expensesDeleteButton").prop("disabled", false);
                   $("body").undelegate("#expensesDeleteLink", "click").delegate("#expensesDeleteLink","click",function() {
                        if(!confirm("Θέλετε σίγουρα να διαγράψετε τα έξοδα;")) return false;
                        $("#expenses-grid").yiiGridView("update", {
                            type: "POST",
                            url: '.$expensesDeleteLink.'+$.fn.yiiGridView.getSelection(id),
                            cache: false,
                            success: function(data){
                                $("#expenses-grid").yiiGridView("update");
                                $.ajax({
                                    url: '.$expensesGetNewEmptyRecordLink.',
                                    cache: false,
                                    success: function(html){$("#expensesDetails").html(html);alert("Επιτυχής διαγραφή εξόδων.");}
                                });
                            },
                            error: function(data) {
                                alert("Δεν ήταν δυνατή η διαγραφή των εξόδων."+data);
                            }
                        });
                        return false;
                    });
                }else{
                    $.ajax({
                        url: '.$expensesGetNewEmptyRecordLink.',
                        cache: false,
                        success: function(html){$("#expensesDetails").html(html);}
                   });
                    $("#expensesUpdateButton").prop("disabled", true);
                    $("#expensesUpdateButton").parent().removeAttr(\'href\');
                    $("#expensesDeleteButton").prop("disabled", true);
                }
             }',
    ));

 ?>
    </div>
    <div class="expensesButtonDiv">
         <?php echo CHtml::link(CHtml::button('Νέα Σελίδα', array('style'=>'width:10em', 'class'=>'linkButton')),array('expenses/create', 'id'=>$model->appartmentBlock_id));?>
    
         <?php echo CHtml::link(CHtml::button('Διόρθωση', array('disabled'=>'disabled', 'id'=>'expensesUpdateButton', 'style'=>'width:10em')),array('expenses/update', 'id'=>''));?>
    
         <?php echo CHtml::link(CHtml::button('Διαγραφή', array('disabled'=>'disabled', 'id'=>'expensesDeleteButton', 'style'=>'width:10em')),'#', array('id'=>'expensesDeleteLink'));?>
    </div>
    </td>
    <td>
        <div id="expensesDetails">
            <?php echo $this->renderPartial('_view', array('model'=>$model), false, false); ?>
        </div>
    </td>
</tr>
</table>
</div>

and this is inside _view.php:

<div class="formApp">

<?php $form=$this->beginWidget('CActiveForm', array(
	'id'=>'expenses-form2',
	//'enableAjaxValidation'=>false,
)); ?>

<table class="expDetails">

<?php echo $form->label($model,'monthAndYear'); ?>
                    <?php
                    
                    $describeDateLink = CJavaScript::encode($this->createUrl('expenses/describeDate', array('monthAndYear'=>'')));
                    
                    if($model->isNewRecord){
                      $this->widget('ext.EJuiMonthPicker.EJuiMonthPicker', array(
                        'model' => $model,
                        'attribute'=> 'monthAndYear',
                        'options'=>array(
                            'dateFormat'=>'yy-mm',
                        ),
                        'htmlOptions'=>array(
                            //'onChange'=>'js:$("#month").prop("value", "");',
                            'onChange'=>'js:$.ajax({
                                    url: '. $describeDateLink .'+value,
                                    cache: false,
                                    success: function(html){$(\'#month\').prop(\'value\', html)}
                                });',
                            'size'=>'10px',
                        ),
                      ));
                    }else{
                        echo $form->textField($model,'monthAndYear', array('disabled'=>'disabled','size'=>'10em'));
                    }
                   ?>
                    <?php echo $form->error($model,'monthAndYear'); ?>



<?php
                            if($model->isNewRecord) 
                                echo CHtml::ajaxSubmitButton('Καταχώρηση', $this->createUrl('expenses/create',array('id'=>$model->appartmentBlock_id)),
                                        array(
                                            'type'=>'post',
                                            'success'=>'function(data){$("#expenses-grid").yiiGridView("update");}',
                                            'live'=>true,
                                        ),
                                        array('id'=>'myAjaxSubmitButton'.uniqid(), 'style'=>'width:100px')
                                     );
                            else
                                echo CHtml::ajaxSubmitButton('Διόρθωση', $this->createUrl('expenses/update',array('id'=>$model->id)),
                                        array(
                                            'type'=>'post',
                                            'success'=>'function(data){$("#expenses-grid").yiiGridView("update");}',
                                            'live'=>true,
                                        ),
                                        array('id'=>'myAjaxSubmitButton'.uniqid(), 'style'=>'width:100px')
                                     );
                    ?>


<div class="row buttons" style="text-align:right;margin:0 50px">
                <?php echo CHtml::link(Chtml::button('Ακύρωση'), array('expenses/index', 'appartmentBlock_id'=>$model->appartmentBlock_id)) ?>	
	</div> 

<?php $this->endWidget(); ?>