adding a CIFS-share as autochanger

Greetings, sorry to come up with that topic again, but I am caught in 
loops here and can't find the solution.

I have a working setup with a tape-changer etc

Now I want to add a second autochanger:

it's a Samba-share on a NAS, I have added it to fstab with creds etc and 
the bacula user can mount/umount it and read/write.

I now try to add it to bacula-sd.conf and bacula-dir.conf ... and to 
that hosts-API to be able to manage the slots etc

See what I have:

# bacula-sd.conf

Device {
   Name = "NAS-Chgr1-Dev1"
   Description = "Backup NAS FPSS"
   MediaType = "vtape1"
   ArchiveDevice = "/mnt/bacula/nas_backup"
   RemovableMedia = no
   RandomAccess = yes
   LabelMedia = yes
   AlwaysOpen = no
   Autochanger = yes
   RequiresMount = yes
   MaximumVolumeSize = 750000000000
   MaximumFileSize = 10000000000
   MinimumFeeSpace = 1000000000000
   SpoolDirectory = "/var/spool/bacula"
   MaximumSpoolSize = 118111600640
   MountPoint = "/mnt/bacula/nas_backup"
   MountCommand = "/usr/bin/mount %m"
   UnmountCommand = "/usr/bin/umount %m"
}

Autochanger {
   Name = "FileChgr1"
   Device = "NAS-Chgr1-Dev1"
   ChangerDevice = "/dev/null"
   ChangerCommand = "/dev/null"
}

#  bacula-dir.conf

Storage {
   Name = "NAS-loader"
   SdPort = 9103
   Address = "192.168.0.60"
   Password = "EkcGSOMEPWDn-jKp8"
   Device = "FileChgr1"
   MediaType = "vtape-01"
   Autochanger = "NAS-loader"
   MaximumConcurrentJobs = 1
}

--- is that correct?

If I then go to that host-API page I try to import the settings but 
somehow I never get the slots displayed in bacularis etc

Something is missing and I lost track here.

Pls advise ... thanks a lot ...