Anyone ever use FLVPlayback.preview (successfully)?

I’m building an flv player with a list of videos and i want to load a preview image for each video.

FLVPlayback.preview seems like it would fit the bill but alas like many of Adobe’s ‘helpful’ utility methods and classes, it doesn’t work.

I just wanted to see if anyone had ever tried to use it and had any success.

FYI preview accepts a string [write-only] and I get no errors if i pass it a numeric string (for position of the thumb) or a url. It just sits there like a bump on a log.