HELP!  Why does my printer disconnect when router unplugged?

I have a Canon MP480 that connects to my wireless router in my house. Unfortunatley, my Canon MP 480 disconnects from the network anytime my router is unplugged. Any ideas?

It would be helpful if you could tell us if your printer is connected to the airport unit via wifi or USB. Also, which airport unit are you using and what firmware is installed. You can see the firmware version using the airport utility (in your utilities folder in Mac OS X).
Seth

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