i have written some extenstions to FLC code, for testing common problems that occur when software like VideoMach add there own packets, or add packets that are not documented (some software even tries to add packets from the FLX format, into FLC files).
if the movie.flc is not too big, can you provide me a link to it, i'll test it out, see if it runs on my system.
As kittycat said; there are better formats.
FLC is good when lossless small animations are required..
but once you get to about 30k FLC, your file effeciency is really over extended, and you should be considering other formats, like (for lossless: AVI+lossless codec), for lossy, MPEG1, or AVI+any codec.. codecs like Indeo are good, because they are typically on all windows machines already, and are better than the other default codecs on windows machines.
If your looking for open source solutions or linux or cross-platform solutions... listen to Kittycat.