pCP LMS server net mount setup error

Today I started the insitu update for pCPc3.5.0 and the LMS Setup Network Disk Mount ends always with an error message

[ INFO ] Mount configuration changed for 192.168.178.21:/public
[ INFO ] Unmounting Old Mount Point: /mnt/shared.
[ INFO ] New Mount Point /mnt/shared is not in use.
[ INFO ] Checking new Mount Point /mnt/shared.
[ INFO ] New Mount Point /mnt/shared is not in use.
[ INFO ] Mounting Disk.
[INFO] mount -v -t cifs -o username=xxx, //192.168.178.21/"public" /mnt/shared
[ERROR] Disk Mount Error, Try to Reboot.
[ INFO ] Backing up files to /mnt/mmcblk0p2/tce/mydata.tgz/-\ Done.
[ OK ] Backup successful.

With pCP 3.21 & 3.22 I had no problems with set the NET mount. I don't understand this.
Thank you.