Hover

Zdravim. Mam web a v menu je hover:

.menu a:hover {
text-decoration: none;
background-image:url(menuhover.gif);
background-repeat:x;
color: #000000;
}

Mozila mi ho vezme v pohodě ale nefunguje mi v Internet Exploleru, prosim nevíte čim by to mohlo být? Předem díky

.menu {
clear: both;
width: 100%;
height: 26px;
background: #000000;
background-image:url(menupozadi.gif);
font-size: 15px;

padding: 13px 0px 0px 0px;
}


.menu a {
text-decoration: none;
font-size: 15px;
font-family: Tahoma,Arial,Verdana,sans-serif;
color: #000000;
padding: 5px 5px 5px 5px;
}

.menu a:hover {
text-decoration: none;
background-image:url(menuhover.gif);
background-repeat:x;
color: #000000;

}