GBDE Additionaly Decryption LockFile

Hey Everyone,

I've been trying to add an additional lockfile to my unmounted gbde
device (twed0) using the following syntax:
gbde setkey twed0 -n 1 -l /usr/existingfile.lock -L /usr/newfile.lock

And repeatedly get:
Error 22 decrypting lock.

I was just wondering if anyone either had a similar problem or had any
advice as to what was going wrong.

Thanks

-John