MP530 Printer doesn't respond to Windows 7

[AWS]

Have owned Canon PIXMA MP530 for about 5 years networked to 2 computers running XP Pro. Just replaced one of the computers with one running Windows 7 Pro (64 bit). New computer is up and sees both printers (we have a Brother HL-4040CN also). Can print
on the Brother, but will not print on the MP530. Error message is "printer not responding".

Tried downloading updated driver from Canon with no effect. Tried downloading MP530 firmware update with no luck.

Any ideas out there?

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