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also try other emulators like psxeven, ssspsx or pcsx.
You're not loading from savestates are you? Does this happen even when you load from a memory card?

 

[BRILLIANT]

from what I've seen of an older thread, using psxeven would solve the problems.
And the compatibility list mainly lists which games load

 

[BRILLIANT]

http://www.ngemu.com/forums/showthread.php?t=61250&highlight=driver