Game out of sync for Fifa 2003

[Mandeep]

A friend and I played a few Direct IP games with no lag that could be noticed distinctly, but everytime we got around to the 70th minute; the game would pause and then a few seconds later a message would come up saying "Game out of sync" and the game would end. Has anybody else had this problem? We were both using a no-cd for Fifa 2003, yet I'm not sure if that would matter. Any help would be appreciated, thanks.