Strange Red Alert 2 Problem

[Hom3r]

In advance, I am not sure if this topic is right for this board's topic..here goes

Now that I have my computers networked, i would like to play red alert2 with my brother, but stupid me, I lent the allies CD to a friend so now I only have 1. I tried to make a copy so that I don't have to use the CD, it worked...sorta. When i get into the game and begin to play, after about 30 seconds into the match everything self detonates...WEIRD. If anyone has a solution to my problem I'd be very grateful, thanks