Can't add Destination Drive to Ghost 15

The external HD i had been backing up to died, so I replaced it with a new one.  However, I can't get Ghost 15 to recognize that there si a new drive in the system.

 

This new "F:" drive is working properly, I just can't get Ghost 15 to find that it's present.  I want to be able to back up to it, but can't.  How do I add it to Ghost 15?