I recently purchased a copy of lord of the rings, the battle for middle-earth 2. The game installs fine and allows me to play it for a bit but then the game just closes down and goes back to the desktop and a message is diplayed saying out of memory, even though i have a gig of RAM. I took a screenshot and attached the image. Please can anybody help me solve this.

My spec:
Pentium 4 2.8 prescott
1 gig DDR Ram
Radeon 9800 pro
250 gig sata hard drive

managed to fix it, turned out my graphics card driver and direct x were corrupt, just had o reinstall them both