ASP .NET 2.0 on IIS 7.5 - Event ID error 3010 when launching site

Posted on 2011-05-11
Last Modified: 2012-05-11
Hi Everyone,

I'm getting the below errors in the below Application Log when launching my site on IIS 7.5  It previously worked fine on IIS 6.0.  Any ideas how I can fix this?

Thanks in advance,

Event code: 3008
Event message: A configuration error has occurred.
Event time: 5/11/2011 3:19:40 PM
Event time (UTC): 5/11/2011 10:19:40 PM
Event ID: bac01447f1e446a4a8b3df2b6855cb72
Event sequence: 1
Event occurrence: 1
Event detail code: 0
Application information:
    Application domain: /LM/W3SVC/24/ROOT-5-129496259800783046
    Trust level: Full
    Application Virtual Path: /
    Application Path: D:\Inetpub\vhosts\\httpdocs\
    Machine name: PURCHASINGDESK-W01
Process information:
    Process ID: 4648
    Process name: w3wp.exe
    Account name: PURCHASINGDESK\IWPD_22(rockyourhea)
Exception information:
    Exception type: ConfigurationErrorsException
    Exception message: Could not load file or assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
Request information:
    Request URL:
    Request path: /
    User host address:
    Is authenticated: False
    Authentication Type:  
    Thread account name: PURCHASINGDESK\IWPD_22(icinardi)
Thread information:
    Thread ID: 5
    Thread account name: PURCHASINGDESK\IWPD_22(icinardi)
    Is impersonating: False
    Stack trace:    at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   at System.Web.Configuration.Common.ModulesEntry..ctor(String name, String typeName, String propertyName, ConfigurationElement configElement)
   at System.Web.HttpApplication.BuildIntegratedModuleCollection(List`1 moduleList)
   at System.Web.HttpApplication.GetModuleCollection(IntPtr appContext)
   at System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers)
   at System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context)
   at System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context)
   at System.Web.HttpApplicationFactory.GetPipelineApplicationInstance(IntPtr appContext, HttpContext context)
   at System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)
Custom event details:
Question by:Theodosios
    1 Comment
    LVL 27

    Accepted Solution

    check the framework your app pool is set to use.
    by default IIS 7 looks uses framework 4.0 once its installed.

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