navigation isn't clickable Options

[jbarber07]

basically, the navigation and most things towards the top of the page aren't clickable. im certain its because of the "drips" on the header, but is there any way to fix this? here is my code

CODE

<style>
.profileWidth table { margin-bottom:412px; width:800px; }
.rail { display:none; }
.gap {
background:url() top left no-repeat;
width:1300px; height:632px;
position:absolute; top:0; left:50%;
margin:0px 0 -5px -1300px;
</style>

<div class="gap"></div>

<style>
.masthead {position:absolute; top:150px; margin-left:-650px; left:50%; width:1300px; height:632px; z-index:2;}
</style>

<div class="masthead">
<img src="http://i618.photobucket.com/albums/tt262/justinbarberphotography/PMIBAW/newlogo.png" />
</div>