My Box Office is connected to a D-Link DIR 825 router wirelessly via a Trendnet 649UB N USB adapter attached to its front USB port. I also have a D-Link DNS 323 NAS connected to the router.
I have the stock PO5 firmware installed.
When I attempt to browse the contents of the NAS via uPNP, only folders are displayed (even when under the "ALL" file type tab). Sometimes nothing appears at all. When I go to the "Network" tab of the setup menu, I find that the three options are greyed out and I cannot scroll down to access them. However, under "Wireless Setup", an IP address is visible and there are 4 bars of signal strength displayed which fluctuates slightly. It might be worth noting that prior to browsing I am able to navigate to the three network options and modify each. After browsing, they are greyed out.
Typically, if I switch the Box Office off at the rear of the unit, and restart it, my movie files re-appear and are playable (even .mkv's with slight stuttering).
I must say that these formus have been very useful...shout out to aasoror who turned me onto this unit from RFD...