Cycles GPU Render problem

I’m having a problem with rendering a scene in cycles with my GPU.
For some reason, the scene renders fine in the viewport with the ‘rendered’ shading option. But when I try to actually render the image, this happens;

http://i1279.photobucket.com/albums/y539/Shaade_Silentpaw/error_zpsa0b35865.png

It suddenly stops like this.

Can anyone help?

I’m using Blender 2.69/Cycles render with a GTX 570.

Ah, nevermind. I think my GPU may not have enough VRAM…