title: Asp.net forms authentication cookie not honoring timeout with IIS7
body: <p>Authentication cookies seem to timeout after a short period of time (a day or so). I am using Forms Authentication and have the timeout="10080" with slidingExpiration="false" in the web.config. With that setting, the cookie should expire roughly 7 days after the user is successfully authenticated.</p>
  
  <p>This worked as advertised with IIS6, but when I moved the site to IIS7, the cookie expires much quicker.  I've confirmed this behavior on multiple machines with IE and Firefox, leading me to believe it's an IIS7 setting.</p>
  
  <p>Is there a hidden setting that is IIS7 specific related to authentication?  All other authentication types are disabled for the website, except for anonymous user tracking.</p>