[GtkGLExt] ChoosePixelFormat failed.

[z pekar gmail com]

Hi,
I have an GTK+ (/VTK) application that uses gtkglext and  works well on
Linux, once I try to run it on Windows I get wollowing dialog with
error:
ChoosePixelFormat failed.

I had the same errors with 2 of examples comming together with
gtkglext package -  pixmap and pimap-multi after I have reduced the
number of colors to 256 they worked, but my program still doesn't
work.

I have this error on 2 computers - Windows2000 and XP

does anybody has a clue what could it be?

thank you in advance
Zeev Pekar