Ie10 ignores width from any control

Hi, I have a dropdownlist wiht a widt parameter. In ie9 it works, but when i sue ie10 it ignires the width that I put.
<asp:DropDownList ID="Beneficiarios" runat="server" Font-Names="Tahoma" Font-Size="8pt" Width="1px" Enabled="False">
What can i do???
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