<span class="btn-pTool">
<a class="btn-pToolName" href="#"></a>
</span>
That's empty. Try adding a non breaking space to give the link and span some contents:
<span class="btn-pTool">
<a class="btn-pToolName" href="#"> </a>
</span>
It's also worth noting that the CSS spec says that you can't give a span a background image because spans are not block elements. Put the background image code in the div's class style, or use <p> instead of <span>
. Some browsers might let you put a background in a span, but not all will (perhaps older versions of IE).