Hi y'all

I have a custom umbracoRequestModule, which I placed in the umbraco.presentation namespace.

namespace umbraco.presentation
{
    public class requestModuleOverride : requestModule
    {
        public requestModuleOverride() : base()
        {
        }

        //... my custom methods here
    }
}

I modified my web.config to use this new class:

<add name="umbracoRequestModule" type="umbraco.presentation.requestModuleOverride" />

Later, in one of my user controls, I access this overridden requestModule like so:

requestModuleOverride requestMod = (requestModuleOverride)HttpContext.Current.ApplicationInstance.Modules["umbracoRequestModule"];
requestMod.myCustomMethod();

On my local dev machine, this works just fine.

However, when I try and access this user control from my staging site, I get an exception:

Unable to cast object of type 'umbraco.presentation.requestModule' to type 'umbraco.presentation.requestModuleOverride'.

My staging server is using the same line in web.config I posted above - that is, I specify umbraco.presentation.requestModuleOverride as the type for umbracoRequestModule. 

If I change my user control to access the requestModule as the original type (not my overridden type), I can access it just fine.

Can anyone suggest how I might start tracking this down - why does Umbraco use my custom type on my dev machine but use the default requestModule on the staging machine, ignoring my web.config?