I'll just close this conversation (from my part) by saying that TVersity is an UPnP MediaServer, not DLNA.
It is widely used becase there's a functional free version.
Any report that a Philips TV doesn't do FF/REW with TVersity must be answered with this in mind - it is not a DLNA media server.
foobar2000 (which I also use, just for audio), is also just an UPnP media server - with the UPnP component installed.
I hope this helps.
I had this problem, I've posted about it, nobody has given me a clear answer and I haven't found it anywhere.
I've found the answer myself and just shared it.