There are three common reasons:
- You don't have flash player plugin on your browser or you have a version prior to version 9. At least flash player version 9 is required.
- You have an ad filter installed on your browser that blocks curlypage.
Anyway, if you are not able to see curlypage on homepage of this site you can use the contact form or fill an issue in curlypage project at drupal.org to request support.