After looking at your screenshot, I noticed that your link does not include a target attribute. As a result, the browser is trying to open the link in the iframe which contains the link. Since SmarterTrack's security policy restricts what sites may be contained within an iframe, the link will not open in this manner. To correct the issue, add a target attribute to the link. This should give you something like:

<a href="YOUR URL" target="_blank">YOUR LINK TEXT</a>