I was able to use your sample to create a test page, and it worked just fine. My assumption is that there is something wrong with your svg file. Can you paste that here as well? Here is the sample I used.
<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg">
<!-- Created with SVG-edit - http://svg-edit.googlecode.com/ -->
<g>
<title>Layer 1</title>
<ellipse ry="30" rx="30" id="svg_1" cy="50" cx="50" stroke-width="5" stroke="#000000" fill="#FF0000"/>
</g>
</svg>