[AccessD] Run Time Error 424 Object Required

Why might I be getting this error. Below is the code that has an issue. Error occurs at the line Enabled =.  RequestDate.Value = 4/4/2012

Dim db As Database
        Set db = CurrentDb()

        With Me.RequestDate.Value = Null 'Eliminate the previous order ID.
            .Enabled = True 'Indicate that the current record is the start of a new order.
            .SetFocus
         End With