Not sure who "you" is whom you mention, but:
Does the sound work in other games?
Did you configure the sound of the game correctly (if possible)?

sorry, i meant a "hey pericles" who wrote the game worked perfectly
the sound works in other games but i really don't know how to configure it

can u help me??

maybe it's just this game which won't work
have u ever played it?

If I recall correctly, Metal Mutant only has Internal Speaker sounds (digitised). They weren't that good anyway.