When I first setup my wireless HP printer with my MBP it worked fine. Originally the network I was using did not have a passcode on it and after I setup passcode on the router in order for someone to connect wireless the printer will not communicate with the computer. The internet work just not the printer. When I go to print a document it recognizes the printer, sends the printer and then says the file has been printed but nothing ever comes out of the printer. Any idea on how to fix this