Hi,
Please cross check connection profile and sync profile settings:
Connection profile details should be
server:relay server
port:80 or 443
farmid: MBS farm ID.
Synchronization profile should be
server:relayserver
port: 80 or 443
stream parameter : url suffix(/ias_relay_server/client/rs_client.dll/RBS farm ID)[Example for relays erver running in window server].
Rgrds,
Jitendra