parse error coming in installing and running mediaproxy for cdrtool

i have been trying to install cdrtool following the http://cdrtool.ag-projects.com/installation-guide/
when i try to run mediaproxy using :- ./media-dispatcher --no-fork
i am getting following error....

INFO [main] Starting MediaProxy Dispatcher 2.6.6
INFO [main] Twisted is using epollreactor
CRITICAL [main] cannot read the RADIUS configuration file
CRITICAL [main] failed to create MediaProxy Dispatcher: dictionary(34): Parse error: Illegal type: ipv4addr
ERROR [main] Traceback (most recent call last):
ERROR [main] File "./media-dispatcher", line 53, in <module>
ERROR [main] dispatcher = Dispatcher()
ERROR [main] File "/usr/lib/python2.7/dist-packages/mediaproxy/dispatcher.py", line 486, in __init__
ERROR [main] self.accounting = [__import__("mediaproxy.interfaces.accounting.%s" % mod.lower(), globals(), locals(), [""]).Accounting() for mod in set(DispatcherConfig.accounting)]
ERROR [main] File "/usr/lib/python2.7/dist-packages/mediaproxy/interfaces/accounting/radius.py", line 48, in __init__
ERROR [main] self.handler = RadiusAccounting()
ERROR [main] File "/usr/lib/python2.7/dist-packages/mediaproxy/interfaces/accounting/radius.py", line 84, in __init__
ERROR [main] raddict = pyrad.dictionary.Dictionary(*dicts)
ERROR [main] File "/usr/lib/python2.7/dist-packages/pyrad/dictionary.py", line 147, in __init__
ERROR [main] self.ReadDictionary(dict)
ERROR [main] File "/usr/lib/python2.7/dist-packages/pyrad/dictionary.py", line 329, in ReadDictionary
ERROR [main] self.__ParseAttribute(state, tokens)
ERROR [main] File "/usr/lib/python2.7/dist-packages/pyrad/dictionary.py", line 204, in __ParseAttribute
ERROR [main] line=state['line'])
ERROR [main] ParseError: dictionary(34): Parse error: Illegal type: ipv4addr

thanks in advance