[mod_python] XML-RPC?

Any idea what I'm doing wrong here? I've tried both just pasting this 
HTTP data to the server and using the below client code to make the 
connection. Either way I get a ResponseError from the server code - from 
the xmlrpclib. If I have the server print the POST data it has read it 
looks correct. If I paste the POST data from that into a Python script 
and run it through xmlrpclib.loads() it works fine. What is wrong?

client
------
server = xmlrpclib.ServerProxy ( 'http://localhost/mike.py', verbose = 
True )

try:
        print server.testing ( 41 )
except xmlrpclib.Error, e:
        print 'ERROR:', e


server
------
def handler ( req ):
        req.content_type = "text/xml"
        req.send_http_header ()
        data = req.read ()
        try:
                params, method = xmlrpclib.loads ( data )
        except xmlrpclib.ResponseError, e:
                req.write ( xmlrpclib.dumps ( e ) )
        return apache.OK


>>I want to use Mod_Python to implement an XML-RPC server. Am I right in 
>>trying to use CGIXMLRPCRequestHandler for that? How do I get the POST 
>>data from Mod_Python so I can run it through the XML-RPC handler? Thanks.
>>    
>>
>
>I use xmlrpclib together with the xmlrpc_registry (by Eric Kidd), but I
>guess it works for any xmlrpc handler.
>
>params, method = xmlrpclib.loads(req.read())
>  
>