Ghost won't open AFTER a backup

Ghost 15 backs up perfectly at 2:00am.

The backups are there on the external drive and open and work fine.

 

BUt when I go to open Ghost 15 the next morning it won't open.

It hangs at the end of the progress bar.

It always says something like destination not available.

 

I need to reboot every day or Ghost 15 doesn't open.

 

Mike C

PS:

Win XP Pro, SP 3, 2 gigs ram

2 TB external WD "My Book" HDD.