Desktop Computer Does Not Appear In Explorer's "Network"

The computer name of my Win7(64b) Desktop is called "AVA". For the purposes of debuging, I've disabled AVA's LAN adapter and connected it to the network by enabling its Dlink DWA556 wireless adapter. The attached system config file represents this decision. In addition to AVA I have 3 other Win7 computers and on WinXP computer on the network (all wireless) and all on the same workgroup.

In the network section of explorer (no matter which computer I am using) I see ALL the computers except AVA.If on AVA, I start the network sharing center and do a network map, I see my router in the middle, the internet on the right, and then dotted lines (showing wirless) to the left to just two computers (AVA and one other Win7 computer). Hovering the mouse over those computer icons shows me their IP4 and IP6 addresses as well as the mac address. The other Win7 computers and my networked printer show up at the bottom under the note that says "The following devices can not be placed in the map". (However those computers and the printer are still networked just fine). The winXP computer does not show up on this map.

All in all, you can see that this is a pretty successful home network. Most of the drives an all the computers are shared and explorer can easily see them (including the XP computer) and files can be transfered back and forth, with the exception of the AVA desktop. Even the AVA shared drives can be accessed however if one is willing to type in "//AVA" into explorer at which point all its shared drives can be seen. Also every computer (including AVA) can see the internet and can print.