Can't save Pokemon white 2

Hi,I can't save my Pokemon White 2 in Desmume, so I'm using save states instead.
But I really want the In-Game save to work, so I can continue my game after the credits when defeated the Elite four.I tried the newest version of Desmume, but still couldn't save. (When I choose Save from the menu it freezes)
So I tried saving while using the Gear.. But it also freezes.Another weird thing: The time is stuck on 1:44 everytime I play. I;m using a patched rom, that could be the cause, now I hope to find a solution.
(I already have 6 badges so I really don't want to start over :-[ )Patricia.