Can't enable wireless printing with TC

Hello everyone,

I purchased a Canon Pixma MP620 with my iMac from Apple online. At the time, I had a D-Link router and I set up and printed wirelessly with minimal effort. I just got a TC, and have the iMac, a Macbook and a PC all connected wirelessly. No problems there, and the TC has great range.

Now I can't get the printer to work wirelessly. It prints fine with a USB cord, but I don't want the thing tethered to my TC due to space issues. So far, I have reset and added the printer on the Mac, downloaded newest drivers, and reset the printer itself. The printer appears in System preferences, but during Canon wireless setup utility no printer is detected.

Does anyone have any advice?

Thanks,
Karen