Have you checked your settings on the software?
The printer management program might have a selection of checkboxes with options like "network printer [ ]" It may be worth going through them and checking that you have all the correct boxes ticked. Similarly did you specify network settings when installing the software? Sometimes it's better to enter settings like IP addresses manually rather than relying on the installation to do it properly.
( Lord Gnome, Wed 27 Aug 2008, 9:36, archived)