Awesome emulator, but having some issues

I have the worst specs ever for my computer, and I can play SSB:Melee at 37 fps, sometimes 120 fps!

However the only problem is sometimes SPM causes black screens, and I can't get past the file select in New Super Mario Bros. Can anyone help?
Here's the settings I have:








By the way I should say that all audio settings are off.


Thanks in advance!