gl over VNC

Problem:
When I need to start anything that uses gl I get this message " Xlib: extension "GLX" missing on display "

After some search and trying RealVNC 4.0-11.el4, thightVNC 1.3.9-1.el4.rf and TurboVNC 0.3.3 I manage to solve the problem with xf4vnc.

How I did it:
After installing the TurboVNC I compile the xf4vnc that placed the binary Xvnc in /usr/X11R6/bin/Xvnc while the Xvnc from Turbovnc was in /usr/local/bin/Xvnc.
The script vncserver expected the the Xvnc in /usr/local/bin/ , so I changed the name of the Xvnc from the Turbovnc:

mv /usr/local/bin/Xvnc /usr/local/bin/XvncTurbo

and then created a sim link to the Xvnc from xf4vnc:

ln -s /usr/X11R6/bin/Xvnc /usr/local/bin/Xvnc

And now it works...