unable to locate printer

[Albert Kinderman]

Using OS X 10.4.7 on a Macbook (intel)
cups 1.2.2
Using a print server connected to a wireless router with a LaserJet 2100 (PCL) connected to port 2 (lpt2) on the print server
using HP LaserJet 6 series gimp-print v5.0.0-beta 2

The printer port was found by Bonjour (PS-577C44-P2)

printers.conf contains
DeviceURI mdns://PS-577C44-P2._printer._tcp.local.

when trying to print, gimp-print exits with no errors, but then cups can't find the printer

D [28/Jul/2006:09:13:39 -0700] PID 396 (/usr/libexec/cups/filter/rastertogimpprint.5.0) exited with no errors.
D [28/Jul/2006:09:13:39 -0700] PID 395 (/usr/libexec/cups/filter/cgpdftoraster) exited with no errors.
D [28/Jul/2006:09:13:39 -0700] [Job 8] Gimp-Print ending job
D [28/Jul/2006:09:13:39 -0700] [Job 8] Gimp-Print printed total 1865 bytes
E [28/Jul/2006:09:13:41 -0700] [Job 8] Unable to locate printer 'PS-577C44.local.'!
E [28/Jul/2006:09:13:41 -0700] PID 397 (/usr/libexec/cups/backend/mdns) stopped with status 4!

Note that this same printer works from my wife's Powerbook running OS X 10.3.9 and the same HP LaserJet 6 series gimp-print v5.0.0-beta 2.  My failures also occured using 10.4.6 and the default version of cups.

Any ideas?

Thanks,

Al