Remote server not a TCP/IP host error during vault creation

The Domino server is working correctly and I can administer it,all users can send and receive mail etc.,but during vault creation I get “server error remote server not a TCP/IP host”, when choosing the vault replica server. The server and domain name are correctly displayed but I get the the error when clicking on “next”…any thoughts?

Subject: Check connection record, run trace…

Could you check the connection record? Could it be pointing to the wrong place?You may also try running trace from the client in the user preferences/ports tab.