Brand new Hp photosmart 7520 telling the Macbook pro and sometimes our Mac air 'printer not connected' when we command it to print something. I redid the Wireless Wizard set up. It worked on the Mac air, but still not connecting or staying connected with other Mac. We recently had to replace wireless router. Will a secured network stop this problem? It is most frustrating to keep resetting this over and over. What can I do? Thank you.