I have the following set up...

17² Powerbook running OS 10.3.4 > Airport Extreme > Lantech 8 port ethernet
hub > HP 4MP Laserjet (via a Farallon iPrint adaptor).

If I plug the printer directly into the Airport base station via the LAN
port, I can print. However if I connect the printer to the hub, I can¹t get
the printer working.

This is a guess, but is this because I have to have the base station
connected to the hub via the base station¹s LAN port, not just the WAN port?
I¹m out of cables at the moment so I¹m hoping that isn¹t the case. The WAN
port incidentally is connected to the hub, which is in turn connected to a
D-Link DSL-500 router.

Any tips appreciated.

Cheers..Steven