Game Crash after Nationalism

[torcator]

Hey..

I´m having a huge problem with my game..
after learning Nationalism the game crash..

yes, as you can read... and I don´t know why

my machine is:
Athlon 1.1 Mhz
512 mb
GForce 2 Ultra
8 gb free disk space
SB Live


if any one have an idea, please help me !!!!!