ohhh
kay, I got a few possible solutions as to why that's happening
it might be, the rom directory you set doesn't have the rom in that folder anymore
so what you can do is try to run it offline, and see if it works, then re-set your rom directory again
if that still doesn't work, try redownloading both the rom and emulator
but dont alter the emulator in anyway, except for setting the controller keys
People are always talking about plugins and stuff, but I dont see what's wrong with it
I mean, it works for me just as default O.o
If those solutions dont work for you, we might have to be more elaborate is to what's going on, maybe your video card, cpu, etc.
But I dont think it'll resort to that
I guess those two worked it out o.O
or they just gave up