:
                   "XFB connector causing procengine to hang while transferring files from XFB                                       Gateway to XIB, means XIB is not able to receive files continuously from XFB Gateway,                       it requires to start XFB transfer adapter task for each file reception".

:
                    "For solving this issue please follow following steps:
                     1.)  Stop Gateway.
                     2.)  Stop XIB.
                     3.)  Mention the port number as follows:

                                 Port Number mentioned for CSTCP profile for XFB transfer Adapter task = GUI                                     port number of XFB GATEWAY.

                                 Port number mentioned in "csconfig.ini" file from both sides (XIB and XFB                                            Gateway) should be same.

                     4.)  After checking step3, start Gateway first and then XIB.

Reference :
                             Please refer CASEID : 295398, for full details about this issue and respective                                      solution..