callActionsController is not a function

While testing our plugin, we try to invoke an action to our service layer from our javascript client code, but the request fails saying callActionsController is undefined, and 'is not a function'.   I know other parts of our client code using callActionsController to 'login' to our plugin and that works fine.  Also, we can call WEB_PLATFORM.getObjectId() and that works, but the next call to invoke callActionsController fails.


If we look at the source for WEB_PLATFORM.js, you can see the other methods that work are clearly defined.  However, callActionsController() is not declared in the javascript source.  I see that WEB_PLATFORM is bound to an element id named 'container_app'.  I imagine that container_app must provide the callActionsController call in a some sort Flash/Flex type object.   Could this be a Flash player issue? 


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