Is it possible to apply a DropShadowExtender to a WebPart?

I would like to be able to do something like this:
<asp:WebPartZone ID="CenterZone" AllowLayoutChange="false" Width="100%" runat="server">
<ZoneTemplate>
<abc:CustomControl ID="CustomControl1" Title="Some Custom Control"runat="server" /
<atlasToolkit:DropShadowExtender ID="DropShadowExtender1"runat="server">
<atlasToolkit:DropShadowPropertiesID="DropShadowProperties1"TargetControlID="CustomControl1" Width="5" Rounded="false"Opacity=".75" TrackPosition="false" />
</atlasToolkit:DropShadowExtender
</ZoneTemplate>
</asp:WebPartZone
when i try to test this, i receiveTarget control with ID 'CustomControl1' could not be found for extender 'DropShadowExtender1'.

is something like this possible?

Hi jaredmeade,

Check out this the thread athttp://forums.asp.net/thread/1278118.aspx becauseDropShadowExtender andRoundedCornersExtender are pretty similar.

Thanks,
Ted