can't share printer between 11.10 computers

[watgrad]

I have a desktop and laptop computer both running ubuntu 11.10.
The desktop has a HP F4180 printer connected via USB. The printer is working on the desktop machine. I have shared this printer and selected "Publish shared printers connected to the system" in the printers network menu on the desktop.

On the laptop (which connects to the home network via wireless) I've selected "show printers shared by other system". The shared F4180 printer shows up on the laptop's printer list. However, when I select the printer for printing, or try to view it's properties the printing system hangs...like it is stuck trying to communicate with the printer...

I'm not sure how to fix this, because even when I run the "Problems?" troubleshooter from Ubuntu's Printing app the system hangs....

Description: Ubuntu 11.10
Release: 11.10

cups:
  Installed: 1.5.0-8ubuntu4
  Candidate: 1.5.0-8ubuntu4
  Version table:
 *** 1.5.0-8ubuntu4 0
        500 http://archive.ubuntu.com/ubuntu/ oneiric-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     1.5.0-8ubuntu3 0
        500 http://archive.ubuntu.com/ubuntu/ oneiric-updates/main amd64 Packages
     1.5.0-8 0
        500 http://archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: cups 1.5.0-8ubuntu4
ProcVersionSignature: Ubuntu 3.0.0-13.21-generic 3.0.6
Uname: Linux 3.0.0-13-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Sun Oct 30 07:30:10 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
Lpstat: device for Deskjet_F4100: hp:/usb/Deskjet_F4100_series?serial=CN79J5Z1QS04TJ
MachineType: ACER Aspire M5630
Papersize: letter
PpdFiles: Deskjet_F4100: HP Deskjet f4100 Series, hpcups 3.11.7
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-13-generic root=UUID=e292558c-3ff2-47d1-a54d-faa8a10fe959 ro quiet splash vt.handoff=7
SourcePackage: cups
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/28/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: R01-A3
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: EG31M
dmi.board.vendor: ACER
dmi.board.version: R01-A3
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR01-A3:bd08/28/2007:svnACER:pnAspireM5630:pvrR01-A3:rvnACER:rnEG31M:rvrR01-A3:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: Aspire M5630
dmi.product.version: R01-A3
dmi.sys.vendor: ACER

[watgrad (watgrad)]

Invalid - bug was with the user - problem caused by a firewall configuration problem.