Can't print wireless from macbook (Canon MP495)

Hi,

I have a Canon MP495 printer and I have trouble printing documents from my macbook (OS 10.7.3) via wifi. I can print using the usb cable, but I need to be able to print wireless as well. I never had any problems doing this with my Acer.

I have installed the correct driver, I have gone through the wireless setup assistant (http://www.canon-europe.com/Support/Consumer_Products/products/Fax__Multifunctio nals/InkJet/PIXMA_MP_series/MP495.aspx?DLtcmuri=tcm:13-851038&page=1&type=downlo ad), which makes the "wifi part" appear as a separate printer with mac address, and it actually worked the first time, but it doesn't anymore. When I try, I get a "connection error".

Any ideas?

Thanks for helping!