HP Color LaserJet 2550n (J7957A JetDirect). Unable to conf..

Hello,

I have an HP Color LaserJet 2550n printer with (J7957A Internal
JetDirect Card). TCP/IP is configured via DHCP and I am able to access
the printer via telnet & http. Furthermore ports 9100 and 515 are
open. All sounds great so far!

As Windows NT does not have the nice 'Standard TCP/IP Port' option that
Windows 2000 does I am using the HP Install Network Printer Wizard v4
(4 Oct 2004). This discovers all HP printers on the LAN. The HP Color
LaserJet 2550n appears on the list, however, when I select it I get:

"The current settings on your PC and printer are incompatible with the
JetDirect print server"

Can anyone explain this?

Thanks in advance,

Ant