Radar

When I try to play a multiplayer level that's invloved adding more slodiers to each player in the game i get kikked out of the game and it reboots to windows ,I tryed to disable eax ,harware acceleration , it happens when the game is just telling me that nr2 joined me every time . My spec AMD 1800 asus a7v266-c 512 ddr ram (2100) geforce 4 soundblaster live 5.1 Win 2000 service pack 3