How to solve module not found error on centOS?

Hi, i had successfully installed osqa on my local ubuntu computer and made some changes to it. Now i am having problems with deploying it on the centOS server. The syncdb command runs successfully but i can't access the vhost (getting 500 error). This is the error in the log file:

[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176] mod_wsgi (pid=4303): Exception occurred processing WSGI script '/var/www/osqa/osqa-server/osqa.wsgi'.
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176] Traceback (most recent call last):
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176]   File "/opt/python27/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 250, in __call__
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176]     self.load_middleware()
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176]   File "/opt/python27/lib/python2.7/site-packages/django/core/handlers/base.py", line 47, in load_middleware
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176]     raise exceptions.ImproperlyConfigured('Error importing middleware %s: "%s"' % (mw_module, e))
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176] ImproperlyConfigured: Error importing middleware forum.middleware.extended_user: "No module named markdown"
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176] mod_wsgi (pid=4303): Exception occurred processing WSGI script '/var/www/osqa/osqa-server/osqa.wsgi'.
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176] Traceback (most recent call last):
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176]   File "/opt/python27/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 250, in __call__
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176]     self.load_middleware()
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176]   File "/opt/python27/lib/python2.7/site-packages/django/core/handlers/base.py", line 47, in load_middleware
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176]     raise exceptions.ImproperlyConfigured('Error importing middleware %s: "%s"' % (mw_module, e))
[Fri Jul 29 03:31:08 2011] [error] [client 172.16.137.176] ImproperlyConfigured: Error importing middleware forum.middleware.extended_user: "No module named markdown"

I have installed markdown, mysql-python etc (following the steps outlined here). I tried 'import markdown' in Python interactive shell and it works fine. I googled around and i think i have to set the search directories to the directory where the egg files are located. I did this in osqa-server/osqa.wsgi but this does not seem to solve the problem.

Any help will be appreciated.