When connected to an MDB file (Jet,Access), the View Database Structure states only:

"Open a database connection to view the database structure"

However, I can perform SQL queries and receive the correct response for those queries.  I am using the same connection string that I use in the Quantum plug-in, which does not seem to exhibit any problems.

SQL Explorer:     Version 3.5.0
Eclipse Version:  3.3.0
Eclipse Build ID: I20070625-1500
VM:               JRE1.6.0_03