About Acronis True Image 11 Home

I had set the parameters for True Image to perform an automatic backup at
1:00 PM every Monday and it worked flawlessly for the past several weeks.
Today, however, TI didn't start and after about 30 minutes I checked the log
and found a message indicating that the backup priority had been changed to
Low (I don't know from what). True Image's homepage guided me through a
sequence intended to change or adjust backup priorities, but none of the
links opened and I couldn't find a way to raise the priority higher.
Additional information indicated that the preset for auto backup was set to
low, and I have no idea why the warning message was issued to tell me that
it had been changed.

I was able to force a successful incremental backup and the scheduler hasn't
changed. Why didn't TI start this time automatically?

TIA

Ken Bland