In order to help, we'd need a bit more information about your game than what you provided. What patch for moh do you have? What exact steps do you do? What is the exact wording for the error?
But i dont have checked it doesnt even let me load a SP game
ok I go in to Mohaa and i go into MP and start server then when im ready i click start then the picture of the level comes up and so does the load screen then it say MOHAA HAS TO CLOSE SORRY! :-?