I have a major problem here and I cant see why it doesnt work. I am not trying to do anything complicated, so I must be missing something somewhere. Heres the scenario

I have Mezzmo installed on a 2008 Standard server. I then add folders to Mezzmo. These folders are actually drive letters of drives that are mapped to shares on other servers

So, I add a folder, give it a name of Movies and the location of o:\

If I look in Mezzmo GUI, I can see all the video files in that folder playlist. If I look in All Video Files, I can see the same files. So far so good.
If I fire up my WD TV Live, I can see the folder structure as expected. If I look in the All Video Files playlist, everything is there. If I look in the newly created Movies playlist, it tells me there is no content

I create another folder playlist. For example, I add TV Series on drive t:
As above, I can see the newly added files appear in All Video Files and the TV Series playlists in Mezzmo GUI. On WDTV, the All Video files playlist is correct, the TV Series playlist returns "no content"

I also have a folder playlist that I DO NOT want sub-folders adding to the library. (NO, not my porn collection! A load of VIDEO_TS folders that dont add to library properly!)
So I un-tick the box that says "include sub-folders". If I look in that folder playlist, everything is as expected. If I look in the "All Video Files" playlist, all the VTS files are there! WTF?

Also, I find that sometimes, running a "Maintain Library" results in a small proportion of files being duplicated in the All Video Files playlist. The extra ones seem to have an extra "\" in the path (Although if I select them in WD TV, they still play)!

Any ideas? I really cant believe it should be this difficult. I have been using MediaPortal for several years on my main livingroom PC, so am well used to the concepts behind what I want to achieve. I thought throwing a WDTV box and a DLNA server into a well established and tagged media folder structure should be easy, but it appears not!