CreateUserWizard: Custom Error. I Can find and change the ErrorMessage.Text, but the chg isn't visible

Question

When I set the text of the ErrorMessage Literal control, the text is not visible).

Note that ErrorMessage is found (not Nothing/NULL) and the Visible property is TRUE.

Any idea how to set this text? I'd rather not create a redundant Error label.

Protected Sub CreateUserWizard1_CreatingUser(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.LoginCancelEventArgs) Handles CreateUserWizard1.CreatingUser

        'Checking for a custom error using the custom Customer object  
        Dim Customers As New Customers

        If Customers.CustomerWebSiteExists(txtWebsite.Text) Then
            e.Cancel = True

            ErrorMessage.Text = "This customer website has already been registered."
            Exit Sub
        End If

    End Sub

    Public ReadOnly Property ErrorMessage As Literal
        Get
            Return CType(CreateUserWizard1.ActiveStep.Controls(0).FindControl("ErrorMessage"), Literal)
        End Get