So will someone help me this my website Please

so i wanted it set out like this http://i1299.photobucket.com/albums/ag71/TheIronDoorProject/Untitled_zps5d81f4e3.png but when i go do this the main column pushes the other two columns down, this is my css http://pastebin.com/85b6ttTx

You MainBody should be floating. but how coz i only have the options Right and Left

Something like this?

<table width="100%" border="0" cellspacing="0">
  <tr>
    <td width="25%"><table width="96%" border="0" align="center">
      <tr>
        <td>&nbsp;</td>
      </tr>
    </table></td>
    <td width="50%"><table width="96%" border="0" align="center">
      <tr>
        <td>&nbsp;</td>
      </tr>
    </table></td>
    <td width="25%"><table width="96%" border="0" align="center">
      <tr>
        <td>&nbsp;</td>
      </tr>
    </table></td>
  </tr>
</table>
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