UV map image/move real time update ?

Hi everybody

i want to use a movie file as a texture for my UV mapped object and i have a question …
why is the object not showing the “refreshed” movie image/frame when i increase the frame number ? i have sett " Update Automatically" under view in the UV/Image editor and also in the image/movie panel i have sett under image properties “Auto Refresh” … is this a bug or is this not implemented yet ? … i only can manually refresh the movie on the object when i press “Reload” on the image properties panel … or do i have to use image sequences instead of a movie ?

Greetings Patrick