How to make ClarionLive #570 TSPlus upload code work under Parallels?

ClarionLive webinar #570 includes sample code to send a JavaScript string command from a Clarion windows application, running under RDP and TSPlus, to the HTML5 browser client. The sample JavaScript invokes the file upload action in the JavaScript library that the TSPlus client uses. I would like to do the same thing when running under Parallels HTML5 browser client. Has anyone been able to get Parallels HTML5 to forward JavaScript from a Windows app running on the server down to the client browser?