Command and conquer 3 tiberium wars

I got command and conquer the ultimate collection and I got command and conquer 3 tiberium wars downloaded and when i get in the game i can only go to the menu and when i try to play the campaign or skirmish it kicks me out and i don't know what is wrong with it because it will let me play the skirmish on Command and Conquer 3 TIberium Wars for 2 minutes and it kicks me out of the game and when I play the Campaign it also kicks me out of the game and I don't know what is wrong with the game because i don't know why it keeps kicking me out of the game and was wondering if you can help me figure out what the problem is?