IE6 and CSS Rollovers

[Mutley]

Why won't stuff like this:

[code].welcome {
background-image:url(images/logo_welcome.gif);
background-repeat:no-repeat;
background-position:center;
background-position:center;
height:90px;
}

.welcome:hover {
background-image:url(images/logo_welcome_b.gif);
background-repeat:no-repeat;
background-position:center;
height:90px;
}
[/code]

Work in IE6? Fine in Firefox, I do all my rollovers like this. :(

[jcombs_31]

IE :hover only works on anchor tags.