Cannot connect to a printer.

Have you 'shared' the printer? Also you may need to give permission to allow use within both your Anti-virus and firewall.

Is your printer sharing from the xp machine to the windows 7 machine or is it on the network it self and both are using it as a stand alone unit?

Alex from GA said:

Both are using it as a stand alone unit. Not on a network.

Ok so let me see if I get this right. You have gone into the printers configuration and ip address with a normal browser to then setup wifi printing, and now xp will print to it but windows 7 will only print to it off usb. Not that you have hardwired it to your network and then just find it over the network. The way you describe it sounds like your doing both. Either way what step do you take to add the printer in windows 7 and does it make a difference if you try to print to it in "safe mode with networking" .

Edit: scratch the first part didn't notice you had no normal Lan port on that printer. Then what I would do is on the windows 7 side remove the printer if it exists then install the software only and in the software it should say to find the printer and set it up for wireless and you should not need to use the usb cable during this if it's what I'm thinking of, as that would normally install it for usb only.