True Or False Query Issue

I have a query that shows banned users (I work in a school). When a student's ban has ended, a tick box is checked in a form linked to tblBannedUsers to show they are no longer banned.

The query itself simply queries all records in tblBannedUsers with a username field (UserID) taking search criteria from a box on a form.

However, I want to filter out the students that are no longer banned (those with a tick in the checkbox). To do this, I thought it would be a simple case of editing the query, and in the Ban Lifted field criteria, use =False to say I only want those records with a tick.

This doesn't work and I still get all records given the combo box filter (which are just filtering for a username...if I leave it blank it gives all records via Is Null).

What should I be putting in the criteria to filter out those records with a ticked checkbox?

Thanks,

Steve Swallow

EDIT: I've just done a test query and <B>No</B> is the criteria to use, but when I use this criteria in my query which also take data from a form's combo box it ignore the <B>No</No> criteria.