Can't Play Video (please help...)

I am making a game by using TGE Demo Version.. The problem is I can't play the video that I wanna play.. Here is the program chunk:

new GuiTheoraCtrl(openingVideo) {
      canSaveDynamicFields = "0";
      Profile = "GuiDefaultProfile";
      HorizSizing = "relative";
      VertSizing = "relative";
      position = "0 0";
      Extent = "800 600";
      MinExtent = "8 2";
      canSave = "1";
      Visible = "1";
      hovertime = "1000";
      done = "0";
      stopOnSleep = "1";
      backgroundColor = "0 0 0 0";
      theoraFile = "mod/data/video/Catholic.ogv";
   };

Console says:

<quote>TheoraPlayer::parseHeaders - Error parsing Theora stream headers; corrupt stream? (failed to decode)
TheoraTexture::setFile - Failed to parse Ogg headers</quote>


In addition, I have tried playing videos with ogg format converted by VLC Media Player 0.8.0 (my friend said I should use either 0.8.0 or 0.8.5 because the version of my TGE was old), but all the attempts were zero.. I think the problem lies in the format of the file..

Can anyone help me? Thanks.. :)