Minimserver not finding new music

[MofoDesign]

I have a problem, because mininmserver does not find new music. It all works fine until ... I don't know what happened. I added new music on my server and minimerver does not show the files or the folder, but the files exists! And what is really strange: The whole folder is not shown although it contains files which has shown before.

I try to find solutions by set the startupscan to "full" but nothing changes.

I would be very happy if someone had a suggested solution.