Big problems with Animal Crossing-Wild World

I have a problem with the game: When I start a new game, after the ride, when I quit the vehicle, the only thing I can see it's the sky, but it works normally when I when i enter in a bulidling.
I already tried to reboot the game, download it again but nothing ... :(
I use NO$GBA 2.6 a

I don't have much experience of DS emulation, so this might not work, but try changing the graphics renderer.

Try using No$Zoomer addon as well.
http://forum.romulation.net/index.php?topic=1462.0