Get A File Upload Form Inside A Modal Window

I have a page users can click to upload a photo. When users click I want a modal window to pop up with a simple file upload input inside it and a submit button. I have this working except that when users click submit nothing happens. I'm using nyroModal [URL] and the code I use is:

Code:
<a href="#test" class="nyroModal"><img src="/img/uploadimage.gif" alt="" /></a>
<div id="test" style="display: none; width: 600px;"> <form id="ImageUploadForm" enctype="multipart/form-data" method="post" action="images/upload" accept-charset="utf-8">

[Code]....

If I take the code out of the div=id"test" the form appears on the normal page and submits just fine. Inside the test div tho the modal window pops up with the form inside but the submit button does nothing.