HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Detailed Error Information:

Module   IIS Web Core
Notification   BeginRequest
Handler   Not yet determined
Error Code   0x800700b7
Config Error   Cannot add duplicate collection entry of type 'add' with unique key attribute 'name' set to '*.xoml_*'
Config File   \\?\C:\Inetpub\vhosts\phonesound.com.au\httpdocs\blogs\web.config
Requested URL   http://phonesound.com.au:80/blogs/2014/11/08/children-voiceover-artists/
Physical Path   C:\Inetpub\vhosts\phonesound.com.au\httpdocs\blogs\2014\11\08\children-voiceover-artists\
Logon Method   Not yet determined
Logon User   Not yet determined

Config Source:

   52:     <handlers>
   53:       <add name="*.xoml_*" path="*.xoml" verb="*" type="System.ServiceModel.Activation.HttpHandler, System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" preCondition="integratedMode,runtimeVersionv2.0" />
   54:       <add name="*.svc_*" path="*.svc" verb="*" type="System.ServiceModel.Activation.HttpHandler, System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" preCondition="integratedMode,runtimeVersionv2.0" />

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.

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