non-selectable combo box

[Ted C]

My form has a combo box that allows selection of a LocationID for an event from a Location table. The location list expands, but clicking one of the choices does not collapse the list or select the choice clicked as the field value. I do not know why; a combo box that selects the instructor is working.

The form data source query:

SELECT tblClassSession.ClassEventID, tblClassSession.ClassID, tblClassSession.InstructorID, tblClassSession.SessionDate, tblClass.ClassName, [LastName] & ", " & [FirstName] AS InstructorName, tblLocation.LocationID, tblLocation.LocationName
FROM tblLocation 
INNER JOIN (tblClass 
INNER JOIN (qryInstructors 
RIGHT JOIN tblClassSession 
ON qryInstructors.StudentID = tblClassSession.InstructorID) 
ON tblClass.ClassID = tblClassSession.ClassID) 
ON tblLocation.LocationID = tblClassSession.LocationID
ORDER BY tblClass.ClassName;

LocationID field source query:

SELECT tblLocation.LocationID, tblLocation.LocationName
FROM tblLocation;

[pbaldy]

It sounds like either the combo is locked or the Allow Edits property of the form is No (or perhaps the form is bound to a non-updateable source).