Multiple issues first backup

Yesterday tried to run my first backups with Ghost 15. The basic C drive backup (all this going to an external HD by the way) suceeded. However the My Documents backup failed, as did a backup I created for several folders on my D drive. Ghost just tells me they failed. I tried to find out why but the event log was blank. I searched the help docs for the word "failed" and did not find a way to diagnose the failure. Where do I look for a record of what went wrong?