Problem with Animation Extender in Mozilla / Chrome

I am trying to run Animation Extender on my website but it is only working in IE7.

If I try to run it on Mozilla or chrome, the linkButton remains enabled in firefox n chrome. How to fix this problem ?

This is the code:

Aspx code:

<asp:LinkButton ID="lnkBtnColHelp" runat="server" Text="Click Here" OnClientClick="return false;" />

<div id="moveMe" class="flyOutDiv">
<div style="float:right;">
<asp:LinkButton ID="lnkBtnCloseColHelp" runat="server" Text="X" OnClientClick="return false;" CssClass="flyOutDivCloseX" />
</div>
<br />
<p>
        some content here for whatever text
</p>                         
</div>

<ajaxToolKit:AnimationExtender ID="AnimationExtender1" runat="server" TargetControlID="lnkBtnColHelp">
<Animations>
<OnClick>
<Sequence>
<EnableAction Enabled="false"></EnableAction>

<StyleAction AnimationTarget="moveMe" Attribute="display" Value="block"/>
<Parallel AnimationTarget="moveMe" Duration=".5" Fps="30">
<Move Horizontal="-350" Vertical="50"></Move>
<FadeIn Duration=".5"/>
</Parallel>
<Parallel AnimationTarget="moveMe" Duration=".5">
<Color PropertyKey="color" StartValue="#666666" EndValue="#FF0000" />
<Color PropertyKey="borderColor" StartValue="#666666" EndValue="#FF0000" />
</Parallel>
</Sequence>
</OnClick>
</Animations>

</ajaxToolKit:AnimationExtender>

<ajaxToolKit:AnimationExtender ID="AnimationExtender2" runat="server" TargetControlID="lnkBtnCloseColHelp">

<Animations>
<OnClick>
<Sequence AnimationTarget="moveMe">
<Parallel AnimationTarget="moveMe" Duration=".7" Fps="20">
<Move Horizontal="350" Vertical="-50"></Move>
<Scale ScaleFactor="0.05" FontUnit="px" />
<Color PropertyKey="color" StartValue="#FF0000" EndValue="#666666" />
<Color PropertyKey="borderColor" StartValue="#FF0000" EndValue="#666666" />
<FadeOut />
</Parallel>
<StyleAction Attribute="display" Value="none"/>
<StyleAction Attribute="height" Value=""/>
<StyleAction Attribute="width" Value="400px"/>
<StyleAction Attribute="fontSize" Value="14px"/>
<EnableAction AnimationTarget="lnkBtnColHelp" Enabled="true" />
</Sequence>
</OnClick>
</Animations>

</ajaxToolKit:AnimationExtender>

Css File:

.flyOutDiv
{
     display: none;
     position: absolute;
     width: 400px;
     z-index: 3;
     opacity: 0;
     filter:(progid:DXImageTransform.Microsoft.Alpha(opacity=0));
     font-size: 14px;
     border: solid 1px #CCCCCC;
     background-color: #FFFFFF;
     padding: 5px;
}

.flyOutDivCloseX
{
 background-color: #666666;
 color: #FFFFFF;
 text-align: center;
 font-weight: bold;
 text-decoration: none;
 border: outset thin #FFFFFF;
 padding: 5px; 
}