[2005] trying to loop through text boxes

[texas]

for some reason my code won't recognize text boxes on my webform?

                    Dim myControl As Control
                    For Each myControl In Page.Controls
                        If myControl.GetType Is GetType(System.Web.UI.WebControls.TextBox) Then
                            CType(myControl, TextBox).Text = String.Empty
                        End If
                    Next myControl