title: Functional testing clickAndWait not working
body: <p>I am writing web application in yii with the phpunit selenum testing here is my test case for the login form </p>
  
  <pre><code>public function testHasLoginForm()
      {
          $this-&gt;open('site/login');
          $this-&gt;assertTextPresent('Login');
  
          $this-&gt;assertElementPresent('name=LoginForm[username]');
          $this-&gt;assertElementPresent('name=LoginForm[password]');
  
          $this-&gt;assertTextPresent('Remember me next time');  
          $this-&gt;assertTextPresent('Reset Password?');
  
          $this-&gt;assertElementPresent('name=Login');
  
          $this-&gt;type('name=LoginForm[username]','pradeep@techanveshan.com');
          $this-&gt;type('name=LoginForm[password]','password');
  
          $this-&gt;clickAndWait("//input[@value='Login']"); //this line cause the error
  
      }
  </code></pre>
  
  <p>Everything works find unless i put this command 
  <strong>$this->clickAndWait("//input[@value='Login']");</strong></p>
  
  <p>This line gives me error something like this :</p>
  
  <pre><code>Invalid response while accessing the Selenium Server at "http://localhost:4444/s
  elenium-server/driver/:" ERROR: Command execution failure. Please search the use
  r group at https://groups.google.com/forum/#!forum/selenium-users for error deta
  ils from the log window.  The error message is: Value does not implement interfa
  ce Event.
  </code></pre>
  
  <p>Does anyone has idea why is this happening ?</p>