Techno

I've got an All In Wonder 8600 with 512 DDR so I'm fine to run it. I used to have MUGEN running on Win XP but now all of a sudden it wont work. Right now I get to the point where it asks me to change resolutions. I press Y but nothing happens. I press N nothing happens. I have to tab out of the program to get out. When I did have MUGEN working I would also get this screen error where the white blocks would apear but now that I can't play MUGEN that error still comes with the new one as well. BTW this is what it looks like.