You might try adding the following code to your Normal.dotm. I usually keep such macros in a module called modAuto.
Code:
Public Sub AutoExec()
myForm.show
End Sub
The thing is that Word creates the document before it gets to your code. I am not sure whether or not that will be the case here as well but suspect it will work. This is supposed to run when Normal.dotm is loaded which is a separate event from the creation of the new document.