What directory is your Database installed in? When I look at how my Db is, I see the Covers directory in the same directory as the Db. Also the Covers folder has the same name as my Db like this:

Db Name: Bob's Boots
Covers : Bob's Boots_covers

Maybe you just need to move where your Db or the Covers directory is located.

My stab at resident genius status. ;D

Bob