Triobaali: Try to first configure resolution of the game. The configuration tool can be founded in the start menu folder of "GOG.com-Rayman 2". It can be also found in the place where the installer setuped it (default folder is C:/Program Files/GOG.com/Rayman 2/), in there it is named as GXSetup. It probably crash because your computer can't handle lowest resolution, so choose one that matches with your current native desktop resolution.
EDIT: The game may also randomly crash occasionally when you first time start it after computer boots up. I don't know if it's caused by resolution or not, but you should first try to change it.
Nope, I already changed the resolutions... 3 times. =\
Nothing happened, but thanks for the reply.
EDIT: WTF? It's running know... I have no idea what happened all this time (I tried to run the game many times) but its perfect know. =D
Maybe it was a combination of "native resolution" plus a "restar windows", anyway...
I'll mark your post as a solution to "finish" this topic.