Visited Links Problem

This is my new headache.

I don’t know why, but my visited links doesn’t change anymore. I use the code below, no big deal. But the “hover” only works with the non-yet-clicked links.

I already check all CSS and other pages and I found nothing. Someone know what it could be?

a:link, a:visited {
text-decoration:none;
color:#E1510B;
border:0;
-moz-outline-style:none;
}
a:hover {
text-decoration:none;
color:#45643C;
border:0;
-moz-outline-style:none;
}

THANKS!