Producer Registration is not working in Federated Portal

hi,

i configured Consumer and Producer

in Cunsumer Portal

our connecton test is sucessfull, but when going for Producer Registration its give error,

" Could not register your portal although access to WSDL file was successful. Possible reasons: producer server is down, network problems, or incorrect registration parameters. "

Please help me if any one have solutions.

thanks in advance

regards

chitta