All you need to do is do a disc update. You are missing the IOS needed to play the game. It should put you on system menu 4.1. DISC UPDATE ONLY, NO ONLINE UPDATE.
You might have to burn another image as well though. If the game that you downloaded is unscrubbed, then you can do a disc update an not burn another game. But if you downloaded and it is smaller than 4.37gbs in RAR format, then you need to look for an unscrubbed one, burn it, and then do a disc update with that. Make sure it is NTSC-U when updating.