Access Database Cracking

I am having trouble opening a database, this is the error that I am getting.

***********************Error***********************
The Current User account doesn't have permission to convert or enable this database

To convert or enable this database, ensure the following:
*You must join the work group that defines the user accounts used to access the database
*You user account must have Open/Run and Open Exclusive permissions for the database object.
*Your Uer account must have Modify Design or Administrator permissions for all tables in the database
*Your user account must have Read Design permission for all objects in the database.
*Request that other users cose the database.

***********************End Error*************************

I set all the security options in the File/Properties/Security to full control for everyone

Is there a way around this? How do I join the work group, How do I crack this?

Thanks