Help on Challenge for Flexible videos with FitVids.js

In the code challenge for "Flexible Videos with FitVids.js" The challenge question ask

"Using the unique ID defined within the fitvid script, add the appropriate code to the div that contains the embedded video so it scales with the fluid layout."

The unique ID is "featured-video", but when i try and create a div around the iframe i get the following message:

"Make sure you're adding the correct ID to the iframe's container." I believe I am adding the correct ID to the iframe's container according to the video I watched.

Below is the code I am trying to submit but it doesn't work. Am I missing something?

<div class="container">
        <div class="grid_6 omega">
        <div id="featured-video">
                <iframe src="http://player.vimeo.com/video/50610288?title=0&amp;byline=0&amp;portrait=0" width="400" height="225" frameborder="0"></iframe>     
      </div>
      </div>    
    </div>


<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
    <script src="jquery.fitvids.js"></script>
    <script>
      $(document).ready(function(){
        $("#featured-video").fitVids();
      });
</script>
</body>

</html>```