Access is Denied trying to install iPrint Printer

Windows XP Professional Sp2 workstation with iPrint client v4.26
installed. User is a Power User on workstation.

When logged in as user and try to install any iPrint printer get a "Novell
iPrint" error box with

Error message: Access is Denied
Error group: Windows
Error code: 5

Everyone group has full rights to c:ndps.

iPrint printers can be installed as local administrator and user can then
use printers.

Seems to be restricted to one specific workstation as have many other of
similar build and no problems installing iprint printers.

Any help would be gratefully appreciated.