When adding a printer in the Web Management Site, it cannot find the shared printer attached to another Windows XP machine.
The PrintUsage Pro Web Management Site runs under a guest account. Windows XP by default disables the guest account from having access to a shared printer. Two solutions can fix this problem.
Specify a domain user account to run the PrintUsage Web Management Site through the web hosting service. This must be done on the machine that the PrintUsage management service is installed.
Enable the Guest Account in the Local User and Groups on the Windows XP machine that is hosting the shared printer.
Open Administrative Tool -> Local Security Policy -> User rights assignment, delete the Guest from the “Deny Access to this computer from the network”.
Go to Administrative Tools -> Local Security Policy -> Security Options. Enable the “Network access: Let Everyone permission apply to anonymous users”.
Go to Local Security Policy, Security Settings, reload to take effect.