Problem starting database

I have some databases that I’ve been using for a couple of weeks without shutting down my computer. After shutting down the computer and restarting, some databases don’t start even though the autostart property is set to ‘true’. When I try to start them manually, I get this error:
INODSF1288 Server for this database already active
The databases are definitely not started. All data in the databases are in the ino:etc collections. What could be causing this problem?

Steve Davis