Your website is added to the dynadot web server right when you submit your order.
Your domain appears to be stealth forwarding to yahoo. You would need to change your domain's server setting to Dynadot Hosting to use our web hosting. Our help section shows how to do this:
How do I set my domain's name server settings to use my Dynadot web hosting plan? http://www.dynadot.com/help/question.html?aid=5