HDX can´t access my shared network folder "music"

Hi...sorry another question.

With my ND5XS I used ASSET and my shared network folder called music.

It has write/read-rights for "everyone" and it worked like a charm.

My HDX sees my network, finds the PC-shares and scans it...

First it is an organge point (scanning) then it turns to red.

The "scannable network shares" reports "ACTIVE" but "OFFLINE"...

If I add a new share with the path to my shared folder, in my case "\\LUXEN\Music", an error message comes up saying:

https://goo.gl/photos/s1RKT9Pp46WbBkUA6

Everything else works wonderfully and I put several hundred GBs over night in the "downloads" -folder...

What do I have to do so that the HDX can see/scan my shared "music" folder?