silverligth动画，Storyboard的使用有关问题

silverligth动画，Storyboard的使用问题？
今天想研究一下动画，对一些参数不了解
如下所示，我是想画一个圆，并想让它在加载的时候出现平移效果
前台的一些代码
<Grid.Resources>
  <Storyboard x:Name="StoryboardArrowAnimation" BeginTime="0:0:1" >
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)" Storyboard.TargetName="ElectricPath">
  <DiscreteDoubleKeyFrame KeyTime="0" Value="320"/>
  <EasingDoubleKeyFrame KeyTime="0:0:1" Value="0">
  <EasingDoubleKeyFrame.EasingFunction>
  <CubicEase EasingMode="EaseOut"/>
  </EasingDoubleKeyFrame.EasingFunction>
  </EasingDoubleKeyFrame>
  </DoubleAnimationUsingKeyFrames>
</Storyboard>
<Grid.Resources>
//绘制形状
<Path x:Name="ElectricPath" UseLayoutRounding="False" Width="50" Height="50" Fill="#efeded" Stroke="Black" StrokeThickness="1" RenderTransformOrigin="0.5,0.5" Canvas.Left="360" Canvas.Top="46" Opacity="1">
  <Path.Data>
  <EllipseGeometry Center="25,25" RadiusX="25" RadiusY="25" />
  </Path.Data>
  <Path.RenderTransform>
  <CompositeTransform></CompositeTransform>
  </Path.RenderTransform>
  </Path>
后台在加载完成后，StoryboardArrowAnimation.Begin();Storyboard开始动画吧，但是并没有出现效果，请问各位大哥，小弟哪里设置错误了。

[解决办法]
使用blend做
[解决办法]
StoryboardArrowAnimation.Begin();是否写在InitializeComponent();之后？
[解决办法]

C# code

<UserControl    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"    x:Class="SilverlightApplication11.MainPage"    Width="800" Height="600">          <Grid Background="White">         <VisualStateManager.VisualStateGroups>             <VisualStateGroup x:Name="VisualStateGroup">                 <VisualState x:Name="VisualState">                     <Storyboard>                         <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)" Storyboard.TargetName="ellipse">                             <EasingDoubleKeyFrame KeyTime="0" Value="-384"/>                             <EasingDoubleKeyFrame KeyTime="0:0:2" Value="-164"/>                         </DoubleAnimationUsingKeyFrames>                         <DoubleAnimation Duration="0" To="10" Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateY)" Storyboard.TargetName="ellipse" d:IsOptimized="True"/>                     </Storyboard>                 </VisualState>             </VisualStateGroup>         </VisualStateManager.VisualStateGroups>         <Ellipse x:Name="ellipse" HorizontalAlignment="Left" Height="100" Margin="279,170,0,0" VerticalAlignment="Top" Width="100" Fill="Black" RenderTransformOrigin="0.5,0.5">             <Ellipse.RenderTransform>                 <CompositeTransform/>             </Ellipse.RenderTransform>         </Ellipse>     </Grid>    </UserControl>