Interceptor not working

I don't seem to be able to get the Change Request Models Interceptor to work. Whenever I go to change_request.do if simply loads the form and not the Interceptor page. All of the Answers are set to true. Does anyone know why this might be?

I'm aware Interceptors are considered 'Legacy' having been replaced by Record Producers however they don't seem to offer the same functionality. The Interceptor page is what I want.