By default MSN 7 and above is blocked by Bordermanager I'm led to believe?

I have a NW65 server with BM3.8 and Surfcontrol5 running. I can't seem to
get MSN working?

I've created a filter in FILTCFG for inbound and outbound on port 1863 and
also setup an access rule to allow it both ways.... but it doesnt work :(

Anyone any ideas?

Mark