I have a network that consists of 5 1310 bridges. One is in Root+AP mode and servers as the central node that all others talk to. Today all of the bridges are open with a single hidden SSID. I would like to begin migrating these to WPA encryption. I only have one VLAN on my network. It seems that every time that I change to cipher AES in the encryption manager all the connected bridges lose connectivity. Can I add an existing SSID with WPA-PSK with just one VLAN.