xmlrpclib oddness

[Eric Texier]

The only diff between the 2 following scripts are the test on the
return value of getConnection() which basically open a
xmlrpclib.ServerProxy
Any idea ??
Thanks
Eric

# dd is a dictionnary

server = self.getConnection()
if server != None:
    server.SendTask(dd)

DUMPS:
  File "/usr/people/erict/bin//lib/python2.2/xmlrpclib.py", line 763, in
dumps
    data = m.dumps(params)
  File "/usr/people/erict/bin//lib/python2.2/xmlrpclib.py", line 454, in
dumps
    self.__dump(v)
  File "/usr/people/erict/bin//lib/python2.2/xmlrpclib.py", line 465, in
__dump
    raise TypeError, "cannot marshal %s objects" % type(value)
TypeError: cannot marshal <type 'NoneType'> objects


Where the following work fine:

server = self.getConnection()
server.SendTask(dd)