HP 6980 Missing From Driver List

I have a new macbook running leopard and I'm having trouble getting it to connect to my HP 6980 printer which is connected to a DLink DPR 1260 Print Server. I know I have the print driver installed properly because I can successfully print when my computer is connected directly to the printer via USB. But when I try to add the printer while attached to my print server using Internet Printing Protocol in System Preference I'm supposed to select a driver from a pre-populated list. There are a ton of deskjet drivers in the list but not the one I need. Again, I know the driver is installed on my macbook because I can print when directly connected but I can't print when connected via the print server. My windows machines have no problem printing via the print server.

Any ideas???