.net migration from 3.5 framework to 4.5 framework

I have just joined a team which is migrating  an application from 3.5 framework to 4.5 framework.

I am just setting up my project and am getting this error
the configuration section secureCommunications cannot be read as it is missing a section declaration

I have gone again and checked the config file and it looks identical. Is there any other thing I need to look for. Please note any help would be greatly appreciated.

Regards
YRKS
ChanderMadhaviGmailAsked:
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FamousMortimerCommented:
Hi,

Here are some possible solutions found in some forums...

I had a different reason for getting this error.

This happened during migration of an MVC project from .Net 4.0 to 4.5, where the Microsoft.IdentityModel library is replaced with System.identityModel. In my case I had done all the necessary Web.Config migration steps listed here, but had forgotten to change the section name in configSections section:

<configSections>
 <section name="microsoft.identityModel" type="Microsoft.IdentityModel.Configuration.MicrosoftIdentityModelSection, Microsoft.IdentityModel, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
<configSections>
As written here, the section definition should be:

<section name="system.identityModel" type="System.IdentityModel.Configuration.SystemIdentityModelSection, System.IdentityModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
Go to the application pools in IIS and select the "Set Applicaiton Pool Default" [available in the right top corner], and check the version of .net framework.  Note: It'ld be selected as .net 4.0 version by default
Apparently IIS7 needs a System.WebServer section, even if it is empty. Adding the following to my web.config file fixed my problem.

  <system.webServer>
  </system.webServer>
I had the same error message, and it was because I was missing the .NET 3.5.1 framework on that server. Enabling that fixed my problem: http://blogs.msdn.com/b/sqlblog/archive/2010/01/08/how-to-install-net-framework-3-5-sp1-on-windows-server-2008-r2-environments.aspx

Good Luck!
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