Hello,
I experience the similar problems with UltraRendu like Mike Rubin.
I've installed Drive Mounter. Then added smb name of my server (\\192.168.0.105\music). And yes, I can browse folder URENDU\storage_readonly\nas from computer and I see shared music files here. But I can not access control of MPD from any of my devices (MPDroid, Cantata, GMPC, etc). Of corse in the mpd clients settings i set uRendu address (192.168.0.137). The same thing happens in ympd. What kind of problem can it be? Any idea?
P.S. uPnP from miniDLNA works OK.