Your web host should give you at least 2 name servers to use for your domain. When you set your domain to use your web host's name servers, you do not need to add the name servers' IP addresses.
Steps on how to set your name servers can be found here:
How do I set my name servers for my domain? http://www.dynadot.com/help/question.html?aid=3
You may also need to let your web host know what domain is using your web hosting package so that they can configure their name servers properly. If you cannot view your website, you may want to read suggestions on why your website is offline:
Why is my website offline? http://www.dynadot.com/help/question.html?aid=82
By the way, it appears that your domain is working properly since we can view your website.
[EDIT] Glad to hear that everything is working now.
[This post has been edited by dynadot_staff on Feb 14, 2007 4:24pm.]