500.19 Internal Server Error - RequestFilteringModule config error

I'm working on a site built on the Telligent Community platform. It comes with a zip of the site that I need to setup and build from. I've setup the site and have been working on it, except the default web.config has one thing that breaks the site, unless I comment it out. The line is <requestFiltering allowDoubleEscaping="true" /> in the following section:

<system.webServer>
  <validation validateIntegratedModeConfiguration="false" />
  <security>
    <requestFiltering allowDoubleEscaping="true" />
  </security>
  ... continues ...

If I comment out the line, my site works. If not, I get this error:

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".

One thing I read was to go to applicationHost.conf开发者_开发百科ig file located in windows\system32\inetsrv\config and change the following values in <sectionGroup name="system.webServer"> to "Allow":

<section name="handlers" overrideModeDefault="Deny" />
<section name="modules" allowDefinition="MachineToApplication" overrideModeDefault="Deny" />

I've made the above changes and done an iisreset and I still get the same error. Does anyone have any ideas that will allow this line in my config to work?

You'd actually want to check applicationHost.config (and possibly machine.config) and verify this is set: <section name="requestFiltering" overrideModeDefault="Allow" />