Linn Kazoo doesn't show track numbers

[ALmost]

Hi All,

Noticed that MinimServer doesn't show tracknumbers in Linn Kazoo APP. While Bubble DS APP does show tracknumbers with MinimServer.
When I use Multimedia Server from QNAP then tracknumbers ARE visible in Linn Kazoo APP.
Somehow I prefer to use the MinimServer. So how do I need to modify my settings for the MinimServer in order that tracknumbers appear in Linn's Kazoo?

MinimServer Settings are:
SERVER:
Index Tag: Artist, Genre, All Artists, Composer, Conductor, Orchestra
Item Tag: Blank
listViewAlbums : Blank
mergeFolderAlbums : true
tagOptions: Album.sortTags={Album, Artist}

ADVANCED:
showExtras : true
startupScan : true
tagcustom: AlbumArtist.displayRole={artist}, Composer.displayRole={artist}
tagFormat: Artist.displayFormat={$artist$orchestra$conductor}
All other not listed fields are left Blank

Many thanks in advance.
ALmost