title: does the filePath argument for enterpriseLibrary.ConfigurationSource have to be a non-relative path?
body: <p>The MSDN documentation for this element says "The path that points to the configuration file. This attribute is required if the configuration source is a file." Ok that's fairly obvious. </p>
  
  <p>I tried just setting it to  filePath="enterpriselibrary.config". The file exists in the root of my web app. But when I try to log an exception I get "The configuration file enterpriselibrary.config could not be found." Same thing if I use a relative path "~/enterpriselibrary.config". </p>
  
  <p>So what's the story with this file path, does it have to be a hard path (C:
  ...\MyApp\enterpriselibrary.config)? Is there some documentation that I'm missing?  </p>