Help capturing Ustream.TV on-demand video stream (rtmp:// .flv)

Using Windows XP, Service Pack 3.

I have been trying to find a program, or other way, to capture archived video from Ustream.tv. I am not trying to capture live streams, only pre-recorded videos.

I have tried using several versions of Replay Media Catcher (3.0.1 is the latest I've tried) which advertises it can capture Ustream video and none of them work. 3.0.1 shuts down after a few seconds on every attempt.

2.0.* captures a second and stops.

They all work fine on YouTube.

If anyone can provide any insight or advise it will be greatly appreciated.

Thank you very much!