Global error handling

I need to make sure I am handling all (my code and SDKs) errors in my Flex application. What's a way of global error management in Flex?  Thanks

Here is my code:
in main appication:
creationComplete="globalErrorHandler(event)"
protected function globalErrorHandler(event:Event):void
                                        systemManager.loaderInfo.uncaughtErrorEvents.addEventListener(UncaughtErrorEvent.UNCAUGHT _ERROR, onUncaughtError);
                                        systemManager.loaderInfo.addEventListener(IOErrorEvent.IO_ERROR, onUncaughtError);
                                        systemManager.loaderInfo.addEventListener(SecurityErrorEvent.SECURITY_ERROR, onUncaughtError);
Somewhere at the run time I am generating an unhandled error. I see FP's popup error window and the same error goes into flashlog.txt, but I dont see it getting into onUncaughtError function. What am I doing wrong?
Thanks

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