i think i found the problem. i did a search for the three files: libGL.so, libGL.so.1, libGL.so.2
i found the two first files:
/usr/lib/libGL.so
/usr/lib/libGL.so.1
as for the third one, it is located in the following directory:
/usr/X11R6/lib/libGL.so.1.2.
and the thing is, for the libGL.so.1 file, in the 'type' section, it says that this file is a link, but it also says that this link is broken. should i therefore create a link to the libGL.so file?? or to the libGL.so.1.2 file??
thank you