Animation Extender

I can't disable the target control button. I use this attribute <EnableAction Enabled="false"/> 

Here is the link example that I used.  http://www.asp.net/AjaxLibrary/AjaxControlToolkitSampleSite/Animation/Animation.aspx

<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">  </asp:ToolkitScriptManager>  <asp:AnimationExtender ID="AnimationExtender1" TargetControlID="lnkYellowFade" runat="server">  <Animations> <OnClick><Sequence AnimationTarget="Message"> <EnableAction Enabled="false"/> <OpacityAction  Duration=".0001" Opacity="1" /><Parallel  Duration=".1"><Move Horizontal="200"   /><Resize  Height="250" Width="250" /></Parallel></Sequence> </OnClick><OnHoverOut><Sequence AnimationTarget="Message">  <Resize  Height="5" Width="5" Duration=".1"/><Parallel  Duration=".0001"><OpacityAction  Opacity="0" /><Move Horizontal="-200"/></Parallel></Sequence> </OnHoverOut></Animations>  </asp:AnimationExtender>  

n.aspx