Software: Limitation Of Using SVG Plugin

Is this a limitation of displaying content using a MSIE browser plug-in: elements can't be shared between plug-ins? For example, using MSIE + ASV, I can't seem to define elements in one SVG element, then use them in another SVG tag. What I wanted to do was to define some SVG elements, then use a XHTML table to lay them out in a grid:

<svg>
  <defs>
    <g id="myElement"> … </g>
  </defs>
</svg>

<table>
  <tr>
    <td>
      <svg>
        <use href="xlink:#myElement" > … </g>
      </svg>
    </td>
    <td>
      <svg>
        <use href="xlink:#myElement" > … </g>
      </svg>
    </td>
  </tr>
</table>

While Firefox 1.5 can display my SVG elements in a table, MSIE + ASV shows nothing.