<p>I can't seem to figure out what I am doing wrong here. I publish my website to my server and when I try to run it I get the following exception:</p>

<blockquote>
  <p>Could not load the assembly 'App_Web_kh7-x3ka'. Make sure that it is compiled before accessing the page.</p>
</blockquote>

<p>Has anyone else ever encountered this?</p>

A quick google for "Make sure that it is compiled before accessing the page."
led me to the following
http://www.velocityreviews.com/forums/t301533-could-not-load-assembly-make-sure-that-it-is-compiled-before-accessing-the-page.html
And the problem might be as described that the application pool / website is not set to the correct version of .NET
The following question has another solution as the last reply
http://forums.asp.net/t/1131537.aspx
From the looks up it it would seem your webserver is not properly configured, or that you are refering to a nonexistant/old dll