Hi All,
Sorry for posting in the wrong forum (thanks Robert).
As I stated in my original post, I did add the mxml to my Flex Modules so I do not think that is the problem.
I get a Error #2036 when the SFV starts up and the little Weather Underground Button does show up in the SFV. However, it is not open like it should (i.e. preload="open") and nothing happens when you click the widget button.
Instead, the error is saying that AppEvent.addListener(AppEvent.DATA_PUBLISH, sharedDataUpdated) is an undefined method.
Thanks again !
-Don