First, wrong forum, second, wrong bios, third, wrong bank setting...
He He, i don't mean to be a *****! Get yourself an X2 bios from Xbins, make sure you have the external switch set to the corrct bank setting for you bios size and then if you have more trouble, post back in the X2 forums, you will get a better response!
Cheers
edit - you can't say ***** any more?