AddTextbox Method Powerpoint Set or NotSet

Hi everbody

Im trying to create a textbox using the addtextbox method. my book ("Mastering vba micr. off. 2010") is suggesting the following:

    Dim myTextBox As Shape
    
    With ActivePresentation.Slides(1)
    
    Set myText = .Shapes.AddTextbox(Orientation:=msoTextOrientationHorizontal, Left:=708, Top:=554, Width:=42, Height:=24)
    myTextBox.TextFrame.TextRange.Text = "BLABLA"
    
    End With

This doesn't work. But when I use the method without setting an object it works.

Do you have any ideas why?

note that im using office 2007.

Thanks for your time and help!

-Jon