OK....I have recently converted from PC to Mac. Got a MacBook Air and really like it (still getting used to some commands). The old Cisco router did not seem happy with the switch, but it was time to upgrade anyway, so now have the Airport Extreme. Have connected three Mac's, 3 iPads, and an HP laptop (used for work file archive purposes - almost an external HD). But two items do not connect. Our iPhones won't connect. They detect the network and I enter the correct password, but it won't connect. Same thing with my HP 8600 printer - it used to connect fine to the old Cisco boat anchor, but now it detects the new network but when I enter password, it spins for awhile and is unable to connect. We really depend upon this printer and want to keep the ability to print wireless. Any suggestions/help?