function setFile($filename)
   {
       if (!$imagesize = getimagesize($filename)) {
           $this->_errors[] = 'Cannot open "'.$filename.'" for reading.'; (I think the error is coming from this line)
           return false;
       }
       
       // Create Image from file by type, get and set size
       list($width,$height,$type) = $imagesize;
       switch ($type) {
           case 1:
           case 2:
           case 3:
               $imagefunction = "imagecreatefrom".$this->_imageTypes[$type];
               
               if (!function_exists($imagefunction) || !$this->_image = $imagefunction($filename)) {
                   $this->_errors[] = 'Unable to create images from '.$this->_imageTypes[$type].';
                   return false;
               }
               
               $this->_imageHeight = $height;
               $this->_imageWidth  = $width;
               
               break;
           default:
               $this->_errors[] = 'Cannot determine image type of "'.$filename.'".';
               return false;
       }
       
       return true;
   }