A family of Microsoft relational database management systems designed for ease of use.
You need to REMOVE all permissions from the 2000 DB BEFORE trying to convert. So that means going in as an admin and then running the security tools and deleting all user groups and restoring back to just the generic admin user in the admins group and no special permissions applied. Then you should be able to IMPORT everything from the file into a new accdb file. I would NOT use the SAVE AS feature. Importing may mean having to go back and set some options but it is the cleanest method to get it to the new format and without issues which do occur if you do the conversion.