OpenGL problem

[The Cheese]

I recently installed Il-2 46 on a new Windows 7 64bit laptop, using a Radeon HD 6770 graphics card with 2GB graphics memory, which comes with OpenGL 4.1. But for whatever reason Il-2 46 barely runs at all when on OpenGL. It works quite well on DirectX, but when I change it to OpenGL it gets about 2 frames per second. The main reason this is an issue is because I want to use the Perfect landscape setting available only to OpenGL. Does anyone know what the problem could be?