RaiseEvent on a user control?

[hpl]

I am using user controls in my app. I have no problem communicating between user control and web form (e.g. raising events) but if I try to raise an event on a user control from a button on a web form, nothing happens.

I have used the code below:

Web form:

Public Event ListChanged(ByVal sender As Object, ByVal e As BookListArgs)
    Public Class BookListArgs
        Inherits EventArgs

        Public bookSelected As String
    End Class

Private Sub btnTest_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTest.Click
        Dim bla As New BookListArgs()
        bla.bookSelected = btnTest.Text.ToString
        RaiseEvent ListChanged(sender, bla)
End Sub

User control

Protected WithEvents nyTest As UserControl.ucForm
Private Sub nyTest_listchanged(ByVal sender As System.Object, ByVal e As UserControl.ucForm.BookListArgs) Handles nyTest.ListChanged
       Label1.Text = 100
    End Sub

but nothing happens.