Could you please post the log above here (just select the text from the "Progress..." window, copy it and paste into your post)?

Have you tried to fix your FLV file with Replay Media Catcher before converting?

What web-page were you recording from? I need it to try to replicate the problem and to try to find a solution.

p.s.
Also please note that you can use the official Replay Media Catcher forum. And you can submit a support ticket at www.applian.com