You’ve changed the field in your form from check box to radio selection and republished the form. You test the form and find that the radio selection does auto populate with the contact data. Why?
You must add the following bit of code: value='Yes' and allow check box selections on your custom form to auto populate.
<td class='fieldLabel' style=''><label class='yesNoCheckboxLabel'> <input type='checkbox' value='Yes' name='COLUMN11' id='COLUMN11' label='checkbox2' />checkbox2</label></td>
To clarify, this does not set a default value on the field, but rather displays the check in the box if the data in the database for that field is marked as Yes.