Frozen between turns.

[Mako]

During a game that I've been playing for awhile, I end a turn and wait as the other players take thier turns. As it goes down the list, it stops on player 5's turn. I wait awhile, then hit ctrl-alt-dlt and the screen says Space Empires IV(not responding). This problem has already sent me beyond ticked off, because it has ruined many some of the best games I've played. Someone help me, please.

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Mako the Space Shark