you need to type password precisely the way they were created. they're case sensitive.
you need a password reset/recovery disk to reset/recover password.
you also need the existing password.
since there is no way to verify you as the legit owner of the hdd, nothing can be done.
can't help you with password bypassing/removal. it's against forum rules.http://www.tomshardware.com/forum/277636-28-read-first