Greetings fellow victim of legacy Access databases. First things first. Make sure your database is setup as a DSN in your ODBC Data Sources Window. If you're on 2k/XP this is under the administrative tools menu. If you're on a 9x based system then check around the Control Panel... its bound to exist in there somwhere
For my old Access work I simply did
my $dbh = DBI->connect('DBI:ODBC:'.$my_db_name) or die "$dbh->errstr"; Just make sure you set it up so Windows knows that you will be connecting to it via ODBC.