title: Persistent cookie gets deleted when IE is closed. Works fine in Firefox and Chrome
body: <p>I have an ASP.NET app which uses forms authentication with an option to persist cookie in the login screen. I am testing in local computer which means no web farms are used. 
  In Chrome and Firefox when I log in and persist cookie, then close the browser and then bring up the same page, I am already logged in. So far so good.</p>
  
  <p>In IE however, when I load the same page after closing IE, I get the login screen instead of automatically being logged in. I checked the authentication cookie and noticed that the cookie is gone when I am in the login screen the second time. I see the cookie after logging in and I see it expires a month in the future. My guess the cookie gets deleted when IE closes. I don't know why this happens.
  I have repeated this test several times. I see the authentication cookie after logging in but it's gone in the login screen.</p>
  
  <p>"Empty temporary Internet Files Folder when browser is closed" is NOT checked in Tools->Advanced</p>
  
  <p>I am using IE9 in IE8 standards mode in Windows 7 64bit.</p>
  
  <p>Any ideas?</p>