You create a button on a page in an activity. Add your IR code to this button. You assign ProntoScriptNames to all 3 (activity, page, button) then you do (assuming the prontoscript names are as coded below):

CF.widget('mybutton', 'mypage', 'myactivity').executeActions();
or
CF.widget('mybutton', 'mypage', 'myactivity').scheduleActions();

You invoked the same executeActions() above in your example. The method you used to retrieve the widget was different.