Can't install Remote HD

well, i got my ATV Flash black for some months, but now i decided to install Remote HD from the extras menu.

but i cant install it: when i click on it, it says “installing remote hd…” and the wheel is spinning and… well… nothing happens. if i click menu button, i can go out to the menu. i have internet connection, everything works perfectly. my tv shut down because nothing happened for some hours, just the spinning thing. i didnt get an error message, its not frozen, its still spinning, but nothing happens.

thanks for the future help and keep up the good work!