Worksheet_selectionChange does NOT trigger

For some reason Worksheet_selectionChange does NOT trigger. I even tried pasting it into a new book and making it run all macros. Is it not supported in 2010?

Option Explicit
 
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
    If Selection.Count = 1 Then
        If Not Intersect(Target, Range("D4")) Is Nothing Then
            Call MyMacro
        End If
    End If
End Sub

I have it in module and looked for example code showing so... Because the parent function creates a new sheet... So it CANT have code... Unless I figure out to rename them in a series that have this code snippet pasted into .. I
I'll try again...I thinki had used an example ... I'll try again

Originally Posted by Arkadi

If EnableEvents if deactivated for some reason, it will not run. But to be on the safe side, I would start by putting a stop point at the first line of code, and confirming it truly does not trigger. Or add a messagebox to start... does it truly not trigger?

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
MsgBox Selection.Count 'debugging test.
    If Selection.Count = 1 Then
        If Not Intersect(Target, Range("D4")) Is Nothing Then
            Call MyMacro
        End If
    End If
End Sub

Also, this may seem like a dumb question, but the code IS in the correct sheet? I simply don't know how experienced you are... don't mean to be daft asking that. I've seen users put that in a standard module, which of course would not work.