Mod_python error: "PythonHandler WebQTL"

Traceback (most recent call last):

  File "/usr/lib64/python2.4/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)

  File "/gnshare/gn/web/webqtl/webqtl/WebQTL.py", line 490, in handler
    import BIRN

ImportError: No module named BIRN