Modules & VBA :: Checkbox True When Current Date Is Passed

I have a form that allows you to search for records and displays all the information for that project, typical stuff.

On this form is a subform with the followings Fields:

Inspection Requested, Inspection Due, Inspection Done, Overdue

When you update inspection requested the inspection due is automatically updated to 30 work days from that day.

Now what I'm trying to do is get the overdue field (it's a yes/no field) to automatically check itself when the current date is passed the inspection due and the inspection done field is blank.

Here's what I have that isn't working:

Code:
Private Sub Form_Current()
If DateAddW([REQUEST], 30) < Date And [INSPECT DONE] = 0 Then
[OVERDUE] = True
End If
End Sub

DateAddW is a UDF that works just fine. I've tried replacing 0 with Null and neither works.