Thank you for the suggestions guys
I thought of splitting the file in 2 because it seems that right now its the only solution.
The file size on my hard drive is the same as on the D2 and its about 1Go. The movie length on my computer is 3:25 and when i play the movie from the D2 (meaning executing the file of the D2) on my computer it plays the whole thing. The problem only comes when i play the movie from the D2 itself. The only thing i can think of is that the player of the D2 was not adapted to play movies longer then 2:45... Anybody can second that?