Tip#20
If you are extending components and it doesn’t appear to be working remember to check whether the export settings are appropriate for the component i.e. if your actionscript classes arn’t exported on the first frame remember to take the ‘Export in first frame’ option off your component.
This proved particularly bothersome for the FLVPlayback component since you wont see the component whether it is included or not. Not unless you load a FLV file onto it.
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If anything is unclear or just plain wrong let us know and should ammend it pretty sharpish. If you visited the page with a particular question leave it and if it's flash related I'll try to answer it.