مشكلة في كود الهيدر

<!--
.header {
   background-image: url(http://im26.gulfup.com/2012-03-20/1332259197281.jpg);
   background-repeat: repeat-x;
   height: 338px;
}
.header .header_C {
   background-image: url(http://im15.gulfup.com/2012-03-20/1332259277181.jpg);
   background-repeat: no-repeat;
   height: 338px;
   width: 52px;
   float: right;
}
.header .header_R {
   background-image: url(http://im15.gulfup.com/2012-03-20/1332259277842.jpg);
   background-repeat: no-repeat;
   height: 338px;
   width: 948px;
   float: left;
}
-->