How come C.O.P the recruit doesn't work on my ds R4?

When i download the game on my ds, i went to the game, then the first part works (which r the 1 with the ads) , then after there was a black screen. It wasn't freezed, but there was a black screen and i can't do anything with it. i waited for about 5 mins. still nothing. the web site i download the game was http://hi.92wy.com/nds_info_43105.html

plz help me make the game work again with out the black screen