FS9 Multiplayer

Hi Guys,Im trying to set up my sim for use within the VATSIM network. I have all the software required, but no matter what I try I cant get any sessions to show within SB relay.I have followed the tutorial on VATSIM to the letter, it even tells you to set a multiplayer session up, and if the session doesnt show then drop out of multiplayer and reconnect.Thats where one of my problems starts. Every time I drop out of multiplayer the SIM locks up. Task manager says its stopped responding and I have to restart it.Has anyone got any idea what im doing wrong?Is there some port setting im unaware of?Ive tried a fresh install of FS9 and problems still occur.Any help greatly appreciated.John