link to the past problems(no$gba)

I'm having problems with Link to the Past. I want to play 4 swords with my brother, so I'm always playing on the 2nd GBA so we each have and account. Since you need to play Link to the Past to get upgrades in 4 swords, I tried playing. But when I was watching the beginning that told the story, it says the image crashes, and it closes. Anyone know why?
Please help.

Make sure you don't enlarge the playing screen, this can tend to make no$gba crash.

I don't. I keep everything at the default settings except the sound which I turned off and the controls, which are kind of weird.