Server 2003 - IIS 6 - Framework 4.0

    General discussion

  • I currently have several web sites running on Server 2003 - IIS 6, Framework 3.5.  I am upgrading one of the sites to use Framework 4.0.  To convert the web site, I performed the following steps in IIS:

    • Stopped the web site
    • Edit properties
    • AST.NET Tab - Changed version to 4.0
    • Home Directory tab - Clicked "Remove" button for application name.  Entered a unique new name and clicked "Create".
    • Closed proprty window
    • Moved my new code into local path
    • Restarted website.

    I then tested the website in IE and it worked fine.  Rebooted the server, tested again, and now this website and all others were throwing error 503.  I found the following entry in httperr.log:

     503 N/A DefaultAppPool

    I spent a considerable amount of time researching this error but was not able to determine a fix.  Ultimately I had to revert the web site back to .Net  version 2.0 in the ASP.NET tab to resolve the issue.

    About a month ago I converted a different website on this server to Framework 4.0 and there were no problems.  I am looking for advise on how to address this situation.

    Thank you,


    Monday, September 23, 2013 7:51 PM

All replies

  • Hi, I would post on for such issue. You will receive help faster as they see more cases.

    Thanks you for your understanding

    MCP | MCTS - Exchange 2007, Configuring | Member of TechNet Wiki Community Council | French Moderator on TechNet Wiki (Translation Widget)

    Tuesday, September 24, 2013 12:49 AM
  • Hi,

    As mentioned above, Microsoft has specific forums for ASP.NET and IIS. So it is recommended to post to related forums instead.

    TechNet Subscriber Support in forum |If you have any feedback on our support, please contact

    Wednesday, September 25, 2013 6:35 AM