Iprint client stops prompting for login

iPrint Server: Netware 6.5sp8
Workstation: Windows 7 sp1 64bit, Iprint client 5.69, No Novell client - Systems use DSfW for login.

Over the last 2 months I have been experiencing a problem where after a users password expires the iprint client will not prompt for a new password. Once the problem starts, not even a new user will prompted for a password. You can clear the password cache and it still will not prompt. Sometimes a simple re-install of the client will fix it other times you have to completely remove the client, reboot, and install again.

The problem has only showed up on about 30 computers. All Windows 7 SP1 64bit. None of my XP, Vista, Windows 7 32bit, windows 7 64bit, or OS X have had this problem.

Anybody else seen this issue?