MDI child form display problem

Hi  friends

I have a typical problem in mdi child form.

I am having Three forms( One is Mdi parent(MDiParent)  and the other two are  child forms (Child1, Child2) )
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MDIParent Loads First
--
 Private Sub MDIParent_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim i As New child2
        i.MdiParent = Me
        i.Show()
    End Sub
-----
 The form child2 having one button control
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Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim i As New child1
        i.MdiParent = Me.ParentForm
        i.Show
    End Sub
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The form child1 properties.
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FormBorderStyle = System.Windows.Forms.FormBorderStyle.None
ControlBox = false

 Private Sub Form1_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Activated
        MsgBox("some text")
    End Sub

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while running..
After loading the MDIParent

when I click the Button1 on child2 , child1 loads. The messagebox displays. At the time look at the child form, Its Icon is Flying window and the control box are all appears

How fix the error...
Thank you .
Prakash