Thank You so much, that resolved it. I did change value of MaxUserPort Value =65534 ( it was set by default). I didn't find TcpTimedWaitDelay to set it, but all are working fine now. I tried to do iwaccessmigrate bit it gave me this error........ERROR: in retrieving groups of user necweb\ts_test 925i guess it because that user is not present on this server, but was there on the old server.Thank You