[SOLVED] Requests against elmah.axd always fails with a 500

Requests against elmah.axd always fails with a 500 - Internal server error. Why? :-(

I used the NuPack tool to add Elmah to a site on my developer machine. This worked like a charm, but when I send a request to the elmah.axd page all I get in return is 500 - Internal server error.

My code setup:
Visual Studio 2010
Site built on top of EPiServer 4.62B
Running on .NET Framework 2 (because of EPiServer)

My IIS setup:
IIS 7.5
Classic .NET AppPool (because of EPiServer)

My computer:
running Windows 7 32bit (because of EPiServer)

ELMAH content in web.config:

<sectionGroup name="elmah">
  <section name="security" requirePermission="false" type="Elmah.SecuritySectionHandler, Elmah" />
  <section name="errorLog" requirePermission="false" type="Elmah.ErrorLogSectionHandler, Elmah" />
  <section name="errorMail" requirePermission="false" type="Elmah.ErrorMailSectionHandler, Elmah" />
  <section name="errorFilter" requirePermission="false" type="Elmah.ErrorFilterSectionHandler, Elmah" />
</sectionGroup>

inside configSections.

<elmah>
  <security allowRemoteAccess="yes" />
  <errorLog type="Elmah.XmlFileErrorLog, Elmah" logPath="~/App_Data" />
</elmah>

At this stage I don't really need allowRemoteAccess since I am running everyting from my machine, but trying anything at the moment. And I know elmah.dll is running because the log files are beeing created.

<add verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" />

inside system.web | httpHandlers.

<add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah" />
<add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah" />
<add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah" />

inside system.web | httpmodules.

<add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah" />
<add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah" />
<add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah" />

inside system.webServer | modules

<add name="Elmah" verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" />

inside system.webServer | handlers

I have basically added every suggestion I could find on the net to the web.config, but without it doing any good. Which leads me to believe that something else is wrong, any ideas?

Solution

The only thing I've found that works is to switch my application pool to integrated mode. My app hasn't been fully tested against this though, so I haven't change this in production.