I just set up a network with 3 AP-215s. There are two networks: a main one, and a guest one, set up for devices like printers and cameras. I turned on AirGroup, including BonJour, DLNA, multicast, and AirPrint. The Canon printer finds and signs onto the device (guest) network, and on the Instant screen I can see that device's IP address as a client, and it has a strong signal. If I click AirGroup, that IP address isn't on the list. On my Mac computers, I usually cannot see the printer, and even when I can, when I try to print to it, I get a message saying the printer isn't connected. The printer did work at one point, but now I cannot get it to work on any computer. Am I missing something on my config?