Network password keeping

I have 2 Vista computers, the desktop has a printer, and is run under
administrator with a password.
From the Laptop, if I explore the network, and put in the password, AND
CHECK REMEMBER PASSWORD the laptop will print across the wireless network to
my desktop printer for that session. The next day, after the laptop has been
shutoff and started, the saved password is gone, the box is unchecked, and it
won't print, until I explore the network and sign into the desktop.
The desktop usually does not get restarted unless some update requires it.

How do I save my login on the laptop so the printer will automatically be
connected across the network?

Jeff