DB_Table Quckform Element Rules - Can't get error validation to work

I'm trying to enforce element rules for my DB_Table quickform. I imagine this is obvious for HTML_Quickform users but I only use the quickform option within DB_Table. Anyways I set the qf rules for the table like so: 'qf_rules' => array( 'required' => 'This field is required.' ) If I don't fill in the values of the form nothing happens. It doesn't generate an error message. I don't know if it's supposed to generate a client-side message or what. Anywho If I fill in the required fields the script does execute as normal. I don't know if I have to generate my own client/server-side validation logic or if it's automated for me. Help! Thanks, Jay