AJAX :: How To Center The Slider Extender

I have a series of sliders in a table. All of the contents of each cell are centered, except the sliders. No matter what I do, they stay left-aligned. You can see them here:
http://www.benedict.com/Info/FairUse/Visualizer/Visualizer.aspx

Here is the code for a typical cell:

<td>
<h5>Commercial</h5>
<asp:Label ID="lblUse" runat="server" Text="Label"></asp:Label>
<asp:TextBox ID="tbUse" runat="server" AutoPostBack="false"></asp:TextBox>
<cc1:SliderExtender ID="sldrUse" runat="server"
TargetControlID="tbUse"
BoundControlID="lblUse"
Minimum="0" Maximum="100"
EnableHandleAnimation="true"
Orientation="Vertical"
RaiseChangeOnlyOnMouseUp="False">
</cc1:SliderExtender>
<h5>Non-Profit</h5>
<h4>Use</h4>
</td>

Here is the CSS:

#fuvTable
{
text-align: center;
padding: 0px;
margin: 0px;
width: 100%;
}

Has anyone had any luck in centering sliders?