MsgBox is making the code hang

I have a worksheet change event that fires if a specific condition exists.
[cells to the left are blank ]
I want to tell the User to post data to those cells first, but my MsgBox is making the code hang.
Any ideas.

Code:

---

Private Sub Worksheet_Change(ByVal Target As Range)

If Target.Offset(-4, 0).Value = "" Or Target.Offset(-7, 0).Value = "" Then
    Target.Value = ""
    MsgBox " POST THE DOC FIRST "
    Exit Sub
End If
End Sub

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1) It will raise the run-time error when target row is smaller than 7
2) When you change the value with Change event, you need to disable events, otherwise infinite event loop...

Code:

---

Private Sub Worksheet_Change(ByVal Target As Range)
    With Target
        If .Row < 7 Then Exit Sub
        Application.EnableEvents = False
        If .Offset(-4, 0).Value = "" Or .Offset(-7, 0).Value = "" Then
            .Value = ""
            MsgBox " POST THE DOC FIRST "
        End If
        Application.EnableEvents = True
    End With
End Sub

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Thanks jindon
http://www.vbaexpress.com/forum/imag...er-offline.png
Forgot all about disabling events scenarios.
That solved the problem.