When you are testing an online HTML publication right on your PC (without uploading it to your site), this publication’s links might be blocked. This is caused by the Flash Player’s security policy for SWF files used locally. To solve this problem, you need to upload your book onto the website. If you want to have working links to look through them on your PC, you need to add the book’s catalogue to the Trusted Locations list, with the help of this online editor:
The Internet links should contain "http://" (http://"); prefixes, and the e-mail links should contain "mailto:" prefixes. This can be done automatically in Acrobat by going to Advanced-> Document Processing-> Create links from URLs.