rlm_python:python_load_function: module 'freeradius-cdrtool' is not found

[john li]

i am  trying to install freeradius-cdrtool with freeradius-server-2.1.3 and
get the following the error:

rlm_python:python_load_function: module 'freeradius-cdrtool' is not found
rlm_python:EXCEPT:<type 'exceptions.ImportError'>:
/usr/lib/python2.5/lib-dynload/_socket.so: undefined symbol:
PyExc_ValueError
rlm_python:python_load_function: failed to import python function
'freeradius-cdrtool.instantiate'
//etc/raddb/radiusd.conf[540]: Instantiation failed for module "python"
//etc/raddb/radiusd.conf[2007]: Failed to find module "python".
//etc/raddb/radiusd.conf[2005]: Errors parsing accounting section.
 }
Errors initializing modules

i have google the error and installed the freeradius-1.1.6 with
freeradius-cdrtool successfully,but i still want to install
freeradius-server-2.1.3 with freeradius-cdrtool,

how to fix it?

thanks a lot!
-- 
Regards
John
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