Prevent touchmove default on parent but not child

I am creating a little web app for the iPad and I've got several elements I am preventing the user from scrolling by preventing default on the touchmove event. However, I have a situation where I need the user to be able to scroll a child element.

I have tried to use e.stopPropagation(); but no luck! I also attempted to detect the element under the finger and put the e.preventDefault(); inside an if statement, but again, no luck. Or maybe I was just getting mixed up...

Any ideas? Removing the .scroll divs from the #fix div is a last resort really as it will cause all sorts of headaches.

EDIT

I managed to sort it. Seems like I didn't understand the use of .stopPropagation(); oops!

The working code:

<div id="fix">

    <h1>Hi there</h1>

    <div class="scroll">
        <ul>
            <li>List item</li>
            <li>List item</li>
            <li>List item</li>
        </ul>
    </div>

    <div class="scroll">
        <ul>
            <li>List item</li>
            <li>List item</li>
            <li>List item</li>
        </ul>
    </div>

</div>

And the Javascript:

$('body').delegate('#fix','touchmove',function(e){

    e.preventDefault();

}).delegate('.scroll','touchmove',function(e){

    e.stopPropagation();

});