All you have to do is view the source of that page and follow up on what I originally told you, search for src= then go through each one and look for any that have http and not https or not a relative url and that is the cause of the warning. It took me 2 seconds to find the problems:
1st problem google ad script in 2 places on the page like this:
<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
src="http is not secure
2nd problem Facebook badge:
<img style="border: 0px;" src="http://badge.facebook.com/badge/646107949.477.487349112.png" alt="" width="150" height="89" />
src="http is not secure
3rd problem Twitter badge:
<img src="http://twitter-badges.s3.amazonaws.com/follow_us-c.png" alt="Follow Len_leRoux on Twitter" />
src="http is not secure
Hope that helps,
Joe