monitor lockup/crash loading hotseat game

[jerry_c_62]

I have tried to load a hotseat game several times. The first time I got to the screen where the first player is introduced. When I clicked continue my monitor seemed to go into standby mode. When I tried to turn it back on all I got was the screen that changes the settings on the monitor. Since then I cant even get to the first player screen. Every time I try to load a hotseat game my monitor shuts down. If I do a cont/alt/delt twice my computer returns to the desktop with civ in the task bar. If I try to start it up from htere ---CRASH GOES MY MONITOR---. Single player games seem to be working as well as before. Anyone with an idea what may be causing this. Before I tried loading the hotseat game I had changed my graphics card to a Radeon 9200SE. Things ran a lot smoother in single player after that. I have loaded patch v1.09 before trying to run the hotseat game. I have reinstalled both the game and the 1.09 patch.
I am running a Pent 4, 2GHZ, 512 Megs RAM, ATI powered Radeon 9200SE (made by Gigabyte) I have looked to try to find anyone else with this problem and have not. If anyone has any suggestions or idea as to what may be causing this proble Please let me know.