I currently have a NAS running Twonky 4.4.11, and am trying to view media on WMP 11 running on Windows Vista Ultimate x64.
When WMP11 starts up, it only sees the media server about 50% of the time, and when it does see it, it encounter an error about 5 seconds later and shuts down. Within those 5 seconds I can see album covers and TV show summaries starting to come in, but of course everything stops dead with the error is encountered.
I know that Twonky is not to blame because I am able to access the same media through my PS3 without any problem. Also, I have set up Twonky so it knows my client is Windows Media Player (there is no option to set the version).
In the windows application log I am getting the following error:
Faulting application wmplayer.exe, version 11.0.6001.7110, time stamp 0x49360d30, faulting module wmp.dll, version 11.0.6001.7110, time stamp 0x49362665, exception code 0xc0000005, fault offset 0x000000000043bbac, process id 0x1f3c, application start time 0x01c9b37f38c589f9.
I am guessing this may be a driver issue, but I am not really sure now to research it any further.
ps. I notice that WMP lists my NAS as "PVConnection ... %server name%", not sure if that is another way of indicating this is a UPnP connection.