I have firmware version 1.07, and 2 x 1.5 TB drives.  For backup purposes, I was scheduling weekly copying from Volume 1 to Volume 2.  It seemed to be working fine for a while, but noticed last month it was no longer working, and not listed as a scheduled event.  I have tried re-adding it as a recurring scheduled event, and each time I log back in a few days later, no scheduled events are listed.  Any ideas?