HTTP Error 500.19 - Internal Server Error - The requested page cannot be accessed because the related configuration data for the page is invalid

Hi I am getting the following error when I changed the path of the application - from source control, source control took the latest version of the application but started giving me the following error - any help please? This is the error messages that I am getting

Detailed Error Information:
Module	   WindowsAuthenticationModule
Notification	   AuthenticateRequest
Handler	   ExtensionlessUrlHandler-Integrated-4.0
Error Code	   0x80070021
Config Error	   This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".
Config File	   \\?\C:\SrcCode\IMS\Development\IMS\IMS.Web\web.config

Config Source:
   99:         <anonymousAuthentication enabled="true" />
  100:         <windowsAuthentication enabled="true" />
  101:       </authentication>

More Information:
This error occurs when there is a problem reading the configuration file for the Web server or Web application. In some cases, the event logs may contain more information about what caused this error.
If you see the text "There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined", this error is because you are running a .NET Framework 3.5-based application in .NET Framework 4. If you are running WebMatrix, to resolve this problem, go to the Settings node to set the .NET Framework version to ".NET 2". You can also remove the extra sections from the web.config file.
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Any help please - its urgent - thanks in advance please