Acronis Backup or Restor for a certain Backup does not finish

I am using Acronis True Image 2015 for PC Build 6613 on Win 7 64.

One Backupset out of 5 does not end.
Doesn't matter if i backup or restore.
At a certain time, Acronis is dead and does nothing. Sometimes during file backup, sometimes during
verification, sometimes at restores.
If i am looking with the win 7 Ressourcemonitor, i assume the TrueImage.exe is the GUI running my response. It looks like this Task is waiting for schedul2.exe

Any Ideas ? any Help

Regards