Well, the first problem is with the races, the computers always pick the 4 basic WC3 races.
I didn't get any lag at all, just a fatal error, which is pretty common for me >>.
And I can't open it in World Editor, so that means you protected it. Problems with the protection are:
1) You may have removed the wrong file or done something wrong in the protection.
2) I can't see if anything is leaking with triggers. :/
My only solutions to this would to be check your computer's graphics card and RAM or try checking for leaks.
And btw, your Dialog Box is messed up, that may be te cause of some lag...