CSS help – a:hover rollovers not working

Hi,

I have built a simple wp site here: https://bit.ly/gWs9O3
I have set up my buttons in my style.css file, but the rollovers (a:hover) styles do not seem to be working, on any links. I can’t figure out what I’ve done wrong.

Any ideas?!

Thanks
David

Here is the css I’ve used for my h2 links:

h2 {
font-family: Verdana, Arial, “Helvetica”, sans-serif;
font-size: 14px;
line-height : 15px;
color: #999999;
text-align : left;
font-weight: bold;
text-decoration : none;
padding-bottom: 10px;
padding-top: 10px;
}

h2 a:link {
font-family: Verdana, Arial, “Helvetica”, sans-serif;
text-decoration : none;
color: #999999;
}

h2 a:hover {
font-family: Verdana, Arial, “Helvetica”, sans-serif;
text-decoration : none;
color: #666666;
}

h2 a:active {
font-family: Verdana, Arial, “Helvetica”, sans-serif;
text-decoration : none;
color: #999999;
}

h2 a:visited {
font-family: Verdana, Arial, “Helvetica”, sans-serif;
text-decoration : none;
color: #999999;
}