Can`t view certain movies... (format problem)

[elisa]

Hi,

this is probably going to be a very stupid question for you experts here, but I`m one of those "don`t know anything" people. :roll:

I`ve got the BS Player by a friend, together with some movies. I watched other movies without problems (sound, picture, everything perfectly fine), but when I try to watch these new ones, I get a window saying

"Unknow file format (DIV3)".

What can I do to fix that?

(Sorry if this question is just too dumb to be being posted here but as my dear friend is on holidays I can`t ask him.)

Thanks a lot in advance for any kind of help,
Elisa. :)