buzytee I know this is a couple weeks old, but did you get this to work?
I setup wireless print all the time, here is now I do it.
Make sure all devices are off, now connect the printer to the router and unplug the direct cable to your computer.
Turn on the printer and then turn on your main computer.
On that computer, go to the printer setup and change it to network and then make sure it works.
Once that is working, turn on your laptop, make sure you are wirelessly connected to your router, insert the setup disk for the printer and in the setups it will ask for network or direct.
Select network and follow the instructions. It should see the printer in the settings.
Select the printer and you should be good.
I have set this up on both Windows and Mac and not had a problem.
After it is all up and working, you can, if you wish, change the IP on the printer to a static IP but for the most part I do not do that as it will always get the first IP available, usually a .2, .3, or .4.