Phpexcel Can Not Read Upload File

I want to upload a Excel spreadsheet from the client and then on the server read the spreadsheet and write data to MySQL. I have no need to retain the spreadsheet on the server. I just need to make DB updates. I have phpexcel installed and am able to build and download spreadsheets to the client with no issue.

I am able to display a form, collect the file name, and submit the form. When I try to create a reader with:

$reader = PHPExcel_IOFactory::createReaderForFile($fileName);

I get:

include(PHPExcel_IOFactory.php): failed to open stream: No such file or directory

Can anyone offer suggestions to help me figure out what I am doing wrong? I want to use phpexcel but am not married to this particular approach so I am very open to criticism or suggestions.

Thx

class TransactionsUploadController extends Controller
{

    public function actionCreate()
    {
        $model=new TransactionsUpload;

        if(isset($_POST['TransactionsUpload']))
        {
            $model->attributes=$_POST['TransactionsUpload'];
            $model->uploadedFile=CUploadedFile::getInstance($model,'uploadedFile');

            $fileName = $model->uploadedFile->getTempName();

            echo $fileName;

            $reader = PHPExcel_IOFactory::createReaderForFile($fileName);
            $objPhpExcel = $reader->load($fileName);

            foreach($objPhpExcel->getWorksheetIterator() as $worksheet){

                echo $worksheet->getTitle();

                // will do work here.......................

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

class TransactionsUpload extends CFormModel
{
    public $uploadedFile;

    public function rules()
    {
        return array(
        array('uploadedFile', 'file', 'types'=>'xlsx'),
        );
    }
}

$form = $this->beginWidget(
    'CActiveForm',
    array(
        'id' => 'upload-form',
        'enableAjaxValidation' => false,
        'htmlOptions' => array('enctype' => 'multipart/form-data'),
    )
);
// ...
echo $form->labelEx($model, 'uploadedFile');
echo $form->fileField($model, 'uploadedFile');
echo $form->error($model, 'uploadedFile');

echo CHtml::submitButton('Submit', array('name'=>'submit'));

// ...
$this->endWidget();