RFC Sender Channel Error

Hello All,

I am trying to working on RFC to SOAP Scenario in PI 7.31(Single Stack system).

I have configured RFC sender channel and SOAP receiver channel.

I have registered program id in between between ECC and PI system.

while monitoring RFC Sender  communication channel it shows following error.

    message: CPIC-CALL: SAP_CMACCPTP on convId: 00000000

LOCATION    SAP-Gateway on host sapecc.mss.com / sapgw00

ERROR       registration of tp XI_IDOC_DEFAULT_PI7 from host

            sappi73.mss.com not allowed

TIME        Mon Feb  3 02:51:04 2014

RELEASE     720

COMPONENT   SAP-Gateway

VERSION     2

RC          720

MODULE      gwxxrd.c

LINE        3612

COUNTER     8319

    Return code: RFC_SYS_EXCEPTION(3)

    error group: 102

    key: RFC_ERROR_COMMUNICATION

Exception raised by sappi73|XI_IDOC_DEFAULT_PI7

Thanx in adavance