Link color in Firefox

Link color in Firefox

I'm changing the color of the link in a web page. The css: a:link,
a:visited, a:active { color:#009900 !important; text-decoration:none; }
a:hover {
background-color:#009900;
color:#ffffff !important;
text-decoration:none;
}
.lemmas a:link, a:visited, a:active {
color:#014e68 !important;
text-decoration:none;
}
.lemmas a:hover {
background-color:#014e68;
color:#ffffff !important;
text-decoration:none;
}
.feel a:link, a:visited, a:active {
color:#ff3300;
text-decoration:none;
}
.feel a:hover {
background-color:#ff3300;
color:#ffffff !important;
text-decoration:none;
}
The link are colored only with the last color the one assigned to the
class feel in firefox. In explorer the colors are shown perfectly. Do you
know where is the problem? Thanks