Halo Wars continually pauses while playing

Hey there,

Just wondering if anyone knew how to get around this problem while playing Halo Wars. When I play the game it just continuously pauses on its own over and over. I thought it might have been the game pad, but I have tried 3 now and they all do the same thing. Any help would be most appreciated as the game is almost totally unplayable at the moment with auto pausing all the time.

Thanks in advance!