Behat And Mink Installation In Win 7

Hello to everybody,
it's fourth day that I've been struggling with installing behat and mink extension. But so far I have not succeeded. I'm asking myself if it is possible at all?
I tried PHAR installation, then COMPOSER. With no success.

My setup is:

• OS: Windows 7 Professional 64 bit
  
• Apache server 2.2.14 (win32)
  
• PHP 5.4.9

The point is that behat and mink are apparently being installed fine, but:

• the first suspicion that comes in mind is the absence of predefined steps available in behat (no matter whether I initialize behat with
  

  behat --init

  
  or not).
  
• as a consequence, whatever command I use in FeatureContext.php, for example
  
  

     public function iAmOnTheHomepage()
      {
          $this->visit('/');
      }
  

  
  I get
  

  php.exe : PHP Fatal error:  Call to undefined method FeatureContext::visit() in 
  xxx\protected\tests\features\bootstrap\FeatureContext.php on line 63
  

It seems that behat does not find mink extension, but I can not find out how to force it to do this.