DataGrid Cell selection

[MGRIDEOUT]

Hello,
I have a datagrid in which I click a user's name and get a another datagrid
(DG2) displaying all records for that individual user. In DG2 I need to check
the Due Date colunm to ensure due dates are correctly if not I write out to
the screen a little message. My problem is when I select teh due date column
I get the column header has well, but I only need the contains of the cells
NOT the header.
My code for this routine is:
Sub SetDueDateColor(ByVal s As Object, ByVal e As DataGridItemEventArgs)

Dim strSQL, strDate As String
Dim datNowDate, datDueDate, datReturnDate As DateTime

datDueDate = e.Item.Cells(7).Text

If Now.DayOfWeek = DayOfWeek.Tuesday Then
datNowDate = Now.AddDays(7)

If strSQL > strDate Then
Response.Write("Due date is Over")
Else
Response.Write("Due date is fine")
End If
End If

End Sub
On the line "datDueDate = e.Item.Cells(7).Text", the column header "DUE" is
not a date, so I get an error.
Is there a way for NOT selecting the column header? Or another way of doing
this?
Thanks in advance!
MGR