Red Alert 2 No CD

Ive just installed Red alert 2 no CD and followed the instructions on your site so I can then link up two computers in the house rather than getting 2 copies .

However all seemed Ok and the game starts up but after about 10 seconds in to a game or a saved game it just kills everything on screen and therefore becomes unplayable and does it every time .

Has any one else experienced this and do they have a work round .

Many Thanks.