Pretty much the title.

Game was working prior to the download, and it wasn't after...

I noticed a very fine scratch on the disc (dang brothers not putting it back in the case), so I went and got it buffed, but alas, it's still not working. All other games are working fine.

*sigh* this is yet another bad XBLA experience...

Or does anyone know anything about the disc not working?

This is why i think the beta number of applicants should be increased >_>