I took a look at your account and I noticed that the Physical Address was not added to the footer of your email. This is a requirement of the Can SPAM Act so we require it for all emails sent through Constant Contact. To add the Physical address you can edit your campaign and scroll to the bottom of the page. In the footer (where you see Forward Email) there is a Footer Options block. If you edit this block you can add in the required sections of the business address. Once you have completed this you should be able to send your email.
Hope this helps! Let me know if you have any other questions.