Table GidLines colors - bordercolor not working

Hello
I have a table control, GridLines="both" and bordercolor="black", but i only get a black bordercolor around the table. I use IE 6 due to a company policy, but it looks the same way in Firefox 3.6.3.
Thanks for the help.

Here is a code:
<asp:Table ID="Table2" runat="server" HorizontalAlign="Center" Width="80%" GridLines="Both" BorderColor="Black" >
<asp:TableRow>           
<asp:TableHeaderCell ColumnSpan="8" CssClass="tbStyle" HorizontalAlign="Left">TEXT</asp:TableHeaderCell>
</asp:TableRow>
<asp:TableRow >
            <asp:TableCell  Wid ...