Canon CanoScan LiDE 210 + OSX El Cap. + Synology Server

Hi
I would like to use my flat bed scanner CanoScan LiDE 210 connected to my Synology with my MacBook (OSX El Cap.) but it didn't work.
I can select the scanner in the VirtualHere application (use the device), the device is connected and if I try to start the scan-process I got the message that the device is disconnected.

Thats the System Message log:
20:03:06 INFO :VirtualHere Client 3.3.7 starting (Compiled: Jan 26 2016 17:42:10)
20:03:06 INFO :Using config at /Users//Library/Preferences/vhui Preferences
20:03:06 INFO :IPC available at /tmp/vhclient
20:03:06 INFO :Auto-find using Bonjour - on
20:03:06 INFO :Auto-find using Bonjour SSL - on
20:04:03 INFO :Carried and installed driver are both version 1.0.91
20:04:03 INFO :Successfully bound to driver

thanks
sedrah