Cannot print to shared printer

Yes I am yet another user that can't print wirelessly!

My Canon MP530 is USB connected to a desktop PC. It is set to shared, which is confirmed by Network Magic.

My laptop connects wirelessly to a 2Wire modem. The Canon printer is displayed as shared on the Laptop. The Network Magic troubleshooter reports that "This printer is available for printing
from this computer.

Here's what happens when I try to print from WordPad: I get the Print dialog box showing the Canon
MP530. But when I click Print, nothing happens. Same with Print Preview in WordPad.

Notepad is no better. In that case I get "The handle is invalid."

A test print using the Printers and Faxes folder yields "Test page failed to print."

The Printer Properties PORTS tab shows Canon MP530 on Port USB001, described as "Virtual printer
port for USB." If I click on Configure Port, I get "An error occurred during port configuration. The operation is not supported."


Here are some of the things that I have already tried:

- Deleting and re-entering the share doesn't help.

- Windows Firewall off on both machines - no difference

- Anti-Virus off on both machines - no difference


Any suggestions appreciated!