I have run accross this a few times where a system administrator or a user has inadvertantly changed the file properties of the database files under toolbox to read only.
Open Widows explorer and navigate to the Program Files/Solidworks/Toolbox/Lang/English folder and set all of the mdb files in there so that they are not read-only.
If you have the ansiinch.mdb set as read-only you will see the following error messages with: