Access Denied; Unable to connect.

In a W2K domain, the server shares all printers. HP 4200 and 3500 show the status: “Access Denied; Unable to connect” on W2k and XP workstations, bur server status shows “Ready”. Other HP printers show “Ready” on workstations. All printers will print, but user cannot see print jobs in queue on “Access Denied. Unable to connect.” printers. Has anyone seen this problem, or do you have an Idea as to why it exists and how to fix it?