Call of Duty 2 script problem

[Typhoon1000]

Hello,

I just got CoD 2 and started the singleplayer. Its looking fine, but after i finished the first trainingmission, the next level is loading, but then it throws me back to the main menu and gives me a error message: "failed memory allocation for script usage"
Pretty weird...i know, i dont have a high end PC, but it should work just fine. I changed every possible video option in the menu without success. Multiplayer is working very well anyways. I didnt find a sollution to this anywhere in the net. Maybe someone here knows more about this issue.

My System:
AMD 2.2+
GF4 Ti 4200 64mb
521 mb Infineon
ECS K7VTA3