Icomoon Social issue

Hi, On this page: gooddiabetesdiet.com/responsive/

The code for social icons was this:

<ul class="footer-stay-connected no-list-style">
                                        <li><a href="# class="facebook"></a></li>
                                        <li><a href="#" class="twitter"></a></li>
                                        <li><a href="#" class="google+"></a></li>
                                  </ul>

I changed it to this:
<ul class="footer-stay-connected no-list-style">
                                        <li><a href="# class="facebook"></a></li>
                                        <li><a href="#" class="twitter"></a></li>
                                        <li><a href="#" class="pinterest"></a></li>
                                  </ul>

But I can't make the pinterest icon show up. I have both social icon css files linked. Not sure what's going on.

Thanks,