Checkboxes within user controls, within a form!

[Casbah]

Hi, I'm having a bit of trouble with a user control I have made.
Basically each instance of this control contains a checkbox and a label etc... call it Option
Then I have a second control that is made up of a group of of these controls... call it OptionHolder
So in my form I add an OptionHolder
Then in the load method of the form i add options to the option holder...

        Dim test1 As New Option
        test1.Setup("Option1", 1)
        Me.OptionHolder1.AddOption(test2)

which calls this method of the OptionHolder class

    Sub AddOption(ByRef opOption As Option)
        Me.pnlOptions.Controls.Add(opOption)
    End Sub

which all seems to work fine. Everything shows up as it should...

Now I wanted to add some logic to the checkbox being checked/unchecked event so in the Option class I have

    Public Sub chkBxOptionName_CheckChange(ByVal sender As    System.Object, ByVal e As System.EventArgs) Handles chkBxOptionName.CheckedChanged
        If chkBxOptionName.Checked Then
            MsgBox("Checked")
        Else
            MsgBox("Unchecked")
        End If
    End Sub

When I fire up the option control on its own this works fine, and the message boxes get displayed when i check/uncheck any checkboxes.
However in the main app when I check/uncheck any of the boxes nothing happens?

I'm not sure at all what I'm doing wrong?
Any help greatly appreciated