openGL + SDL_BlitSurface()

Hi!
I want to do 2D frame (about 30 px wide) around 3D openGL view
but I can’t use both (OpenGL and SDL_BlitSurface()) at once :frowning:
When I comment one of them is it works ok - separatly OpenGL
and separatly SDL_BlitSurface() works fine.
Can You help me? Some short example?
Thanks.
Slawus.
Ps. I’m using Linux + SDL 1.2.2 + nVidia OpenGL.