Problem in css

My site worck’s in firefox but in internet explorer it shows bottom ( mai multe stiri )

Please help, were do i did wrong….

Html File….

<div class=”stiri_t”>Alte Stiri <div class=”stiri_link”>mai multe stiri</div></div>

Css File :

.stiri_t {font-family: Tahoma, Arial, Helvetica, sans-serif;font-size: 14px;font-weight: bold;color:#c0b827;border-bottom:1px dotted #ccc;width:650px;margin:2px;}
.stiri_link{float:right;color:#434332;font-family: Tahoma, Sans-Serif;font-size: 10px;margin-top:3px;}
.stiri_link a{}
.stiri_link a:hover{color:#2783b7;text-decoration:underline;}