OpenGL Problem

We have a program on Solaris machine, which uses openGL.
This program runs successfully on this machine.
But the same program gives an error as below if
executed from a Solaris desktop emulator,
“X-Manager(1.3.9)”, on windowsXP machine:::
“This system has no OpenGL support. Exiting.”

We executed “ogl_install_check” from X-manager on WindowsXP machine to verify the installation of OpenGL on the solaris machine.
The following error shows up:

Xlib: extension “GLX” missing on display “NNN.NN.NN.NN:1.0”.
/usr/openwin/demo/GL/sparcv9/ogl_install_check: glXChooseVisual Error: Can’t find visual.

“NNN.NN.NN.NN” is the IP address of the WindowsXP machine that runs X-Manager.
(The ip address is masked for security reasons)

Can someone suggest what is required to get over this error and see the opengl program running using X-Manager from Windows XP machine?
(OpenGL is supported on the Windows XP machine)