X Error: GLXBadContext 173

Hi to all,
I work with opensuse 10.2 and I have the following graphic card: ATI EAX1550.
I wrote a graphic application in C++ and when I try to execute it I get the following error:

X Error: GLXBadContext 173
Extension: 160 (Uknown extension)
Minor opcode: 5 (Unknown request)
Resource id: 0x2a00002
Coin warning in SoOffscreenRenderer::renderFromBase(): Could not set up an offscreen OpenGL context.

Where Coin is the graphic library I’m using and it use OpenGL.
Can I have a help to solve it?
I don’t have much experience in Linux configuration :).