I'm trying to add 2 120x600 banners on the right and left side corner of my site and using the following codes. The code works except that the ads are all the way up pass the navigation bar and the banner instead of starting where the "Feature Games" bar starts.

My site is arcade9.com

here's the code I'm using:

<style type="text/css">
.upper_right{
position:fixed;
top:0;
right:0;
</style>

<style type="text/css">
.upper_left{
position:fixed;
top:0;
left:0;
</style>

<div class="upper_left" >
Ad Code
</div>

<div class="upper_right" >
Ad Code
</div>