Forms :: Combo Box Query - Form That Searches A Table To Show Certain Criteria

I have created a form that searches a table to show certain criteria. I am having trouble with a part where the table uses a checkbox and I am trying to use a combo box on the search form to return the results based on is it checked? Yes/No or both. When I test it I keep getting Runtime error 3075 missing operator.

The sql I am using is below and when I try and see where it is going wrong it highlights the line.

Code : Me.Filter = strWhere

Code:
Private Sub cmdFilter_Click()
Dim strWhere As String
Dim lngLen As Long
Const conJetDate = "#dd/mm/yyyy#"

[Code] .....