loadmovieNum server problem

Hi there,
i hope someone can help me. I´m making a site using loadMovieNum . When I test it locally works ok, but once uploaded to the server … base.swf doesn´t load anymore buttons.swf.
I have on the same folder called “cyclos” this three files:

base.swf (which loads buttons.swf)
index.htm (with base.swf inserted)

It´s all on the same folder so i don´t get why is this happening
Thank you all !
Andrea .