Well that's very bizarre. I tried to reproduce your problem hooked into both a '97 and 2000 mdb file with no problem and saw the fields. I even tried it with a password protected database and it asked me for the password before it would display the Query Wizard Dialog.
Are you following these steps exactly: -
1. Data | Get External Data
2. Create New Query
3. Scroll and select Microsoft Access (whatever)
4. Click Ok and a file dialog comes up with *.mdb and you choose your database.
5. The Query Wizard choose columns dialog pops up
You may have to repair the either the installation of office, or run a repair on the Access database, the indexes may have gone screwy.
Hope this helps