IE behavior with right align Table within cell

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hear simple html page that place table witin cell, and I try to align
inner table to the right,
it's work in Firefox but with IE the innertable never sown on right
side of cell?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
" ">
<html xmlns=" ">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"
<title>Untitled Document</title>


<table width="855" height="756" border="1">
    <td width="340" scope="col" valign="top" align="left">bla bla</td>
    <td scope="col" align="right" id="ss" valign="middle" style="width:
      <table width="200" height="806" border="2" bordercolor="#FF9933"
bgcolor="#ECE9D8" id="Tab2" align="right">
        <td width="420" valign="top" >bla bla</td>
        <td width="70" height="70" style="width: 139px"
valign="middle">bla bla</td>


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