There is an error in the connection string that is preventing this from working. The connection string should be what is contained with the quotes: "Driver={Microsoft Access Driver (*.mdb)};Dbq=%MG_DATA_FILE_PATH%Parcels.mdb"
The quotes technically are not needed. This is also discussed in the help for Studio if you click on the help icon at the top right of the Configure ODBC Database Connection page.
Dave