Question : WPF Storyboard

I am new to WPF and the storyboard is really doing my head in.

I have a control that I fade in using a story board. This works fine, but after it has run I am unable to set the Opacity on the control by code.

The question is why and how do I fix it, I think it needs to be released but I can't find any information on it.

Here is my code, after the control is loaded I manually call the FadeIn event.

Also I have checked the Image_MouseEnter event IS being fired! 
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Imports System.Windows.Media.Animation

Public Class UserControl1

    Private storyboard As New Storyboard()

    Private duration As New TimeSpan(0, 0, 2)

    Private animation As New DoubleAnimation()

    Private Sub Image1_MouseEnter(ByVal sender As Object, ByVal e As System.Windows.Input.MouseEventArgs) Handles Image1.MouseEnter

        Try

            Me.Image1.Opacity = 1.0

        Catch ex As Exception

            MsgBox(ex.Message)

        End Try

    End Sub

    Public Sub FadeIn()

        storyboard.AutoReverse = False

        animation.From = 0.0

        animation.To = 0.5

        animation.Duration = New Duration(Duration)


        Storyboard.SetTargetName(animation, Me.Image1.Name)

        Storyboard.SetTargetProperty(animation, New PropertyPath(UIElement.OpacityProperty))

        Storyboard.Children.Add(animation)

        storyboard.Begin(Me.Image1)

    End Sub

End Class

Answer : WPF Storyboard

I have got the right tools from

http://www.microsoft.com/downloads/details.aspx?familyid=9442b0f2-7465-417a-88f3-5e7b5409e9dd&displaylang=en

Now its working fine.

Thanks

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