Someone please write to me how to resolve the following error.

 OpenGL graphics engine:
  GL_VENDOR: Mesa Project
  GL_RENDERER: Software Rasterizer
  GL_VERSION: 1.4 (2.1 Mesa 7.3-devel)
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/pymol/", line 400, in launch_gui
  File "/usr/lib/python2.5/site-packages/pmg_tk/", line 22, in <module>
    from PMGApp import *
  File "/usr/lib/python2.5/site-packages/pmg_tk/", line 28, in <module>
    from Tkinter import *
  File "/usr/lib/python2.5/lib-tk/", line 38, in <module>
    import _tkinter # If this fails your Python may not be configured for Tk
ImportError: /usr/local/chimera/lib/ cannot restore segment prot after reloc: Permission denied
 Detected 2 CPU cores.  Enabled multithreaded rendering.