My 3500 TV is connected on a Synology 413j NAS, running Media Server.

I basically have two major problems here :

Files which worked yesterday won't be seen anymore today (although I made no modifications ...)
When I add files in the Media folders on Synology, they don't show in the TV browse screen of the Media Server.

Looks like it doesn't refresh an internal cache. Same if I modify the name of a folder - it still shows on TV with the old name.

Any help appreciated.