Band Myspace Help, Need help Options

[Calebdvdsn]

Ok, so on this myspace i'm working on for a buddy of mine, whenever i post a show it moves the header down for some reason, is there a way to lock the header?

CODE

<style>body table { margin-top: 260px;_margin-top: 258px; color: 000000; }
body td table, body div table { margin-top: 0;  _margin-top:0; color: 000000; z-index:9;}</style>

<style>
.masthead {position:absolute; margin-top:-1820px; margin-left:-413px; left:50%; width:XXXpx; height:XXXpx; z-index:2;}
</style>

<div class="masthead">
<img src="http://i36.tinypic.com/2hxapv8.jpg" />
</div>
<style>

Thats the code for the header.