ajax animation problem when scrolling

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ASP.NET

Ajax

hello all

i am using two ajax animation extender (one for open and one for close)in my web application (asp, C#) to show message box as hint for the guest, it is working properly when i show the message and when i close it without scrolling the page, but the problem happen when i show the message and if i scrolling the page to up or down the message follow me (to up or down) then after the message follow me to up and when i close it, if i open the message again it generates from up (in the same position when i close it in the up) but i want always message open beside the target button even if i scrolling up and down, so how i can solve this?

this is my ajax code:

<ajaxToolkit:AnimationExtender ID="AnimationExtender1"  runat="server" TargetControlID="lnkShow">
     <Animations>
         <OnClick>
             <Sequence>
                 <EnableAction Enabled="false"></EnableAction>
                 <StyleAction AnimationTarget="pnlInfo1" Attribute="display" Value="block"/>
                 <Parallel AnimationTarget="pnlInfo1" Duration=".2" Fps="25">
                     <Move Horizontal='10' Vertical='10' />
                     <Resize Height="80%" Width="150%" />
                     <FadeIn />
                 </Parallel>
                 <Parallel AnimationTarget="pnlInfo1" Duration=".5">
                       <Color PropertyKey="color" StartValue="#666666" EndValue="#FF0000"/>
                       <Color PropertyKey="borderColor" StartValue="#666666" EndValue="#FF0000" />
                 </Parallel>
                 <EnableAction AnimationTarget="lnkClose" Enabled="true" />
             </Sequence>
         </OnClick>
     </Animations>
 </ajaxToolkit:AnimationExtender>

 <ajaxToolkit:AnimationExtender ID="AnimationExtender2"  runat="server" TargetControlID="lnkClose">
   <Animations>
         <OnClick>
             <Sequence AnimationTarget="pnlInfo1">
                 <EnableAction AnimationTarget="lnkClose" Enabled="false" />
                 <Parallel AnimationTarget="pnlInfo1" Duration=".3" Fps="25">
                     <Move Horizontal="-10" Vertical="-10" />
                     <Scale ScaleFactor="0.05" FontUnit="px" />
                     <FadeOut />
                 </Parallel>
                 <EnableAction AnimationTarget="lnkShow" Enabled="true" />
             </Sequence>
         </OnClick>
     </Animations>
 </ajaxToolkit:AnimationExtender>

thank you