DataGridView CheckBox Cell won't display checkboxes

I have a DataGridView control on a Windows form that has a CheckBox cell in one of it's columns. The column is bound to a bit field in a SQL Server 2005 database.

The column will display the words "True" or "False" correctly when the TrueValue and FalseValue are set accordingly, but will not display a check box when the TrueValue and FalseValue are set to one or zero.

Anyone able to tell me what I'm doing wrong, or how this control really works?

Thanks

[504 byte] By [OtisMukinfus] at [2007-12-23]