Forms Data Controls :: How To Specify Column Width In ListView

I have the following ListView:

<asp:ListView ID="ListView1" runat="server" DataKeyNames="ListItemID"
DataSourceID="SqlDataSource1">
<LayoutTemplate>
<table id="ListItemsTbl" runat="server" style="width:460px; overflow: hidden">
<tr>
<th>
<asp:LinkButton runat="server" CommandName="sort"
CommandArgument="ItemDescription" Text="Description" />
</th>
<th>
<asp:LinkButton runat="server" CommandName="sort"
CommandArgument="ItemURL" Text="Link" />
</th>
<th>
<asp:LinkButton runat="server" CommandName="sort"
CommandArgument="ItemPrice" Text="Price" />
</th>
<th>
<asp:LinkButton runat="server" CommandName="sort"
CommandArgument="ItemBoughtBy" Text="Bought By" />
</th>
</tr>
<tr id="itemPlaceholder" runat="server" />
</table>
</LayoutTemplate>
<ItemTemplate>
<tr id="row" runat="server" class='<%= Container.DataItemIndex % 2 == 0 ? "row" : "altrow" %>'>
<td style="width: 10%; overflow: scroll;"><%# Eval("ItemDescription") %></td>
<td style="width: 10%; overflow: scroll;"><%#Eval("ItemURL")%></td>
<td style="width: 10%; overflow: scroll;"><%#Eval("ItemPrice")%></td>
<td style="width: 10%; overflow: scroll;"><%#Eval("ItemBoughtBy")%></td>
</tr>
</ItemTemplate>
</asp:ListView>

but the styles have no effect on the listview which just splats itself all over the screen!

What am I doing wrong? How do I control the appearence of the listview?