Using FBv1.5 RC7 SS, IBOv4.2, BCBv5.

On my development system(Win2k), I happily receive events from my
server(another Win2k box), but when I install the system on a
customers system no events are received.

They are running NT4 Server sp6 with Win98 clients. After asking on
the IBObjects forum someone suggested a firewall as a possible
cause. They do run a firewall on their router, but I wouldn't have
expected that to block local traffic, nonetheless I need to
investigate it.

What ports/protocol do the events use?

Also, can anyone suggest anything else that could cause event
notifications not to get through?

Thanks

David