Resolving Error 500 messages in IIS7

Add the following to the Web.config file to help diagnose Server 500 errors on IIS7.

<configuration>
   <system.webServer>
      <httpErrors errorMode="Detailed" />
      <asp scriptErrorSentToBrowser="true"/>
   </system.webServer>

   <system.web>
      <customErrors mode="Off"/>
      <compilation debug="true"/>
   </system.web>
</configuration>