cfajaxproxy returns 404 when using mappings

In the above code `inroll` is a mapped in Application.cfc using this.mappings and the ajax http request tries to hit `/inroll/model/service/ChildService.cfc?method=updateRemote&returnFormat=json&argumentCollection=***` which returns a 404 error.

This works in ACF and the mappings are being used inside the application, so the mapping does in fact exist.