fatal error: cannot redeclare_video_common_get_player?? help please...

Help anyone?
I don't understand this... I was thinking that maybe it was a incompatibility with modules that I installed after this one, but I removed them and the error stays :-S
And the fact that it says that it is redeclaring the function inside the function, how is it possible?

function _video_common_get_player($node) {
  switch (_video_get_filetype($node->vidfile)) {
    case 'divx':
      return theme('video_play_divx', $node);
    case 'mov':
    case 'mp4':
    case '3gp':
    case '3g2':
    case 'mpg':
      return theme('video_play_quicktime', $node);
    case 'rm':
      return theme('video_play_realmedia', $node);
    case 'flv':
      return theme('video_play_flash', $node);
    case 'swf':
      return theme('video_play_swf', $node);
    case 'dir':
    case 'dcr':
      return theme('video_play_dcr', $node);
    case 'asf':
    case 'wmv':
    case 'avi':
      return theme('video_play_windowsmedia', $node);
    case 'ogg':
      return theme('video_play_ogg_theora', $node);
    case 'youtube':
      return theme('video_play_youtube', $node);
    case 'googlevideo':
      return theme('video_play_googlevideo', $node);
    default:
      drupal_set_message('Video type not supported', 'error');
      break;
  }   }

sorry but how do I do that within the code above?

thank you for your help.

Troiana