Can't get movie to play....

OK,
I made a movie using Windows Movie maker.I then saved it into my "C:/Program Files/Entebrain/RPGM2k3/Project/Project1/Movie" file.
I then tried to add it to my game,and vuala!ERROR .SO I then tried to upload it using the RPGM2k3 Tool Bar upload option.It does not work.I checked the files format(RTP,PNG,ect.)and tried to change it to the proper format and could not figure out how.I even tried to do the 'ol "Open With..."
option under the right click options.Again,nothing.How do I make a Windows
Movie Maker movie work in my RPG2k3?And better yet!How do I make it work
upon gamestart?For example(RPGMaker Credits,My Movie,Start Menu)?Thanks for your time.