Can someone please help? I keep getting the following errors every time I play the game.

'Your sysytem has run out of video memory. Please try reducing your video settings. File:\main\civilization4.bak\SDKs\Gamebryo2_0\Core Libs\NiDX9renderer\NiDX9rendererTextureData.cpp, Line167'

Followed by

'This application has requested the runtime to terminate it in an unusual way. Please contact the applications support team for more information'

I know I have the system requirements to run CivIV and have downloaded the latest patches to try and solve the problems but still no luck.

Please, please can someone give me some advice

I had that exact same error word for word, then I put a new gig stick of ram in my computer, and I haven't had it since. (I needed a good excuse to buy more ram anyway)

I am assuming your game is updated all the way, 1.6 I think