Check your web server’s temporary file location. It generates a cache for the webservice which you may need to delete to get your new functionality working.
With regard to getting that code included in to the main Xibo codebase (which is something we’d really like to do), we’d need you to complete a specification etc for this before making changes so we can discuss with you the best way to implement it (perhaps without needing to add webservice calls). Dan gave you the information you need to do that over on your other thread:
Best wishes
Alex