Warum ändert sich mein Header Bild nicht !

<style type="text/css">
<!--
/*Design powerd by max-im-web.de.tl*/
/*© by max-im-web.de.tl*/
/*Das bereitstellen auf der eigenen Homepage ist untersagt! (außer concept-im.net)*/
body{background-color:#000000;}
a{color: #FFFFFF; font-size:11px;}
a:hover{color: #FFFFFF; font-size: 11px;}
td.nav{height:33px; background-image:url(http://80.190.202.79/pic/m/max-im-web/blackbutton2.png);}
td.nav:hover{height:33px; background-image:url(http://80.190.202.79/pic/m/max-im-web/blackbutton1.png);}
td.nav a{color:#FFFFFF;}
td.nav a:hover{text-decoration: overline underline}
tr.checked_menu td{background-image:url(http://80.190.202.79/pic/m/max-im-web/blackbutton3.png);}
tr.checked_menu td:hover{background-image:url(http://80.190.202.79/pic/m/max-im-web/blackbutton4.png);}
td.nav_heading{height:25px;width:185; background-image:url(http://80.190.202.79/pic/m/max-im-web/blackbutton5.png);}
td.edit_below_nav{visibility:hidden;}
td.edit_navi_headbg{background-image:url();background-color:#000000;}
td#nav_{visibility:hidden;height:15px;}
td.headline2{text-align:center;}
td.edit_content_top{background-image:url(http://80.190.202.79/pic/m/max-im-web/blackbutton5.png); height:25px;}
td.edit_content_bottom2{background-image:url(http://80.190.202.79/pic/m/max-im-web/blackbutton5.png);height:25px;}
td.edit_rechts_cbg{background-image:url();background-color:#000000;}
td.sidebar_heading{height:25px;width:185; background-image:url(http://80.190.202.79/pic/m/max-im-web/blackbutton5.png);}
td.edit_rb_footer{background-image:url();}
td.shouty, td.shouty2, td.shouty3, td.shouty4, td.shouty5 {background-image:url(); background-color:#000000; color:FFFFFF;}
td.edit_rechts_bottom{background-image:url();}
td.edit_rechts_sbg{visibility:hidden;}
td.edit_header_full{background-image:url(Bild URL);}
td.headline{color: #FF0000;}
-->
</style>