My guess would be that you created (accidentally or not) a shortcut (*.lnk file) when developing your project and that this is now causing you problems. Whether it's the shortcut you uploaded instead of the cast file, or whether the movie is looking for the shortcut instead of the cast, is impossible to say - but you should explore both of those possibilities.
I think I found out what was going on, some how the download bar that shows on the begining of the movie, gives that problem so I changed the src="????.dcr" to scr="name_of_the_movie.dcr".
That fixed the problem but the macromedia shockwave logo is gone from the download bar.