help with snatcher on sega cd emulation.

hi

i've run into a problem, with snatcher (usa sega cd version, cd image, 112MB). in the beginning, after geting metal gear and blaster and get the message of Jean to go help him at the factory. then i go to the car, get in. but then if i choose the factory ruins location, the car drives and just keeps on driving without getting annywhere.
I dont get errors and the game is not stuck, it just doesn't go on to the next location. all i see is gillian sitting in the car, blinking his eyes and lights flashing past him. (sound also is still working.). i've waited for a couple of minutes once, but thats just impossible just for loading the next area.

I tried different emulators all with the same problem, kega lazarus, ages, wgens. could it be i got a corrupted rom or something like that?

thnx for reading my question and hope someone knows what the problem is.

i've solved the problem, the iso was missing 500 megs or so :dry: . so it was just a bad one so i got me a new one. now i can finally go on playing