Routing in ASP.Net 4 and IIS

[FishGuy]

I have implemented the solution applied below and when I run my website from visual studio 2010 it works fine, the routed requests all work perfectly.
http://erraticdev.blogspot.com/2011/...module-to.html

However once deployed to the server running on IIS7 the routing no longer seems to work and I end up with a 404 page not found error.

I have web config set up as below.

 <httpModules>
      <add name="RegistratorModule" type="RegistratorModule"/>
    </httpModules>

    <httpRuntime requestValidationMode="2.0"/>
	</system.web>

And I have changed the application pool to classic mode. I have also stopped and started the application pool.

Anyone got any ideas what else I could do to try get this working on the server?

I am not sure that the custom module is running when the web server is started, I put the following code in my route mapping method and nothing is getting written to the log.

 string sSource;
        string sLog;
        string sEvent;

        sSource = "Registering Routes";
        sLog = "Application";
        sEvent = "GSP Event";

        if (!EventLog.SourceExists(sSource))
            EventLog.CreateEventSource(sSource, sLog);

        EventLog.WriteEntry(sSource, sEvent);
        EventLog.WriteEntry(sSource, sEvent,
            EventLogEntryType.Warning, 234);

More strangely if I change the IIS application pool mode to integrated
and register the module as below I get Event code: 4010
Event message: An unhandled security exception has occurred.

 <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
      <modules>
        <add name="RegistratorModule" type="RegistratorModule"/>
      </modules>

[FishGuy]

Ok I removed the attempt to write to the application log, apparently that just needed permission to create a new source setting up in the registry. I decided against it alltogether.

I set the web config to debug true and realised the module was running but my routing problem was different.

I now have routing working hooray! by modifying the web config as below.

<modules runAllManagedModulesForAllRequests="true">

however this has now created another problem, none of the javascript/ajax now seems to be working, is there anything special I also need to configure?

[Update] This problem only occurs locally, if I access the site externally it is fine. Any ideas on this problem?