Saturday, December 11, 2010

“The requested page cannot be accessed because the related configuration data for the page is Invalid” why?





Some of the dlls required are not available (here it’s System.Web.Extensions)


  1. Check whether you have System.Web.Extension dlls in your bin directory
  2. Change your Application Pool’s .Net framework to the latest (.Net 4.0 as of today) for this application to the latest in IIS..Follow my screenshots below to change that..



You need to do this because the required dlls are available only with .Net 4.0 (in my case its 4.0)

Isaiah 7:14“Therefore the Lord himself will give you a sign: The virgin will be with child and will give birth to a son, and will call him Immanuel.”

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  1. Why it is invalid? What is the problem?

    1. Hi, Great.. Tutorial is just awesome..It is really helpful for a newbie like me.. I am a regular follower of your blog. Really very informative post you shared here. Kindly keep blogging. If anyone wants to become a .Net developer learn from Dot Net Training in Chennai. or learn thru ASP.NET Online Training . Nowadays Dot Net has tons of job opportunities on various vertical industry.

  2. Just wanted to write a quick not expressing my appreciation for what I gained from reading this article. I found this site by doing a Google search and hope this article is representative of what else I can find in the rest of the website.

  3. still that problem is there. what to do.

  4. Anonymous6:20 PM

    In your web application folder in C:\inetpub\wwwroot\wss\VirtualDirectories\, try using a web.bak file as the web.config file.

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  6. Good content on your blog.

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Godwin Sam Josh is a Microsoft Professional working on almost all Microsoft Technologies.He currently runs his own company called GloriaTech ( He is mainly into providing Mobile and Web solutions using Microsoft Technologies.Godwin also provides training and speaks at various conferences.