IFRAME behaviour

[beyaNet Consultancy]

Hi,
I have a page structure that works on the following principal:

<tr>
<!-- Menu Bar -->
<td>menu items go here</td>

<!-- Iframe - dynamic content -->
<td><iframe></td>
</tr>

In the iframe a document is loaded which makes image calls like so:

<image src="frame/myname.jpg" /> which should match a map in my sitemap defined as:

			<map:match pattern="frame/*.jpg">
<map:generate type="serverpages" src="xsp/svg.xsp">
<map:parameter name="artistID" value="{1}"/>
</map:generate>
<map:serialize type="svg2jpeg"/>			
</map:match>

For hours I could not get any images to load until I referenced the image calls as <image src="../../frame/myname.jpg" />. My question is, as every document loaded in a cocoon environment has to pass through the sitemap before it does anything, why doesn't <image src="frame/myname.jpg" /> work?

many thanks in advance