leagacy ms access database with some unreadable fields

I have an ms access database that have some fields not readable. The ms accesss is microsoft accesss 97 and in cbf format, when I 开发者_Go百科connect to the database it comes out as in the picture.

Some field are readable some are not.

My question is how do I get all the fields readable again so I can work with it

thanks

It may simply be that the fields have been intentionally obfuscated and you need a specific application to see them. Do you know the history of the database?