Problem in New Super Mario Brothers

So I just got myself a M3 DS Real, I'm loving it considering I moved on from my DS-X -.- ., But I'm having a problem with the USA version of the New Super Mario Brothers, it would seem the game freezes if I go through the first door in the 2nd World's Castle. To my knowledge the rom is clean, I got it from a decent place.. Has anyone else noticed this glitch?

I'd really like to progress in the game, being stuck on world two, or having to use the cannon to progress is a bit lame.

i haven't noticed it, i'm using an R4 though, maybe something wrong with the m3, do you have the latest update?

I do have the latest update yes, perhaps I'll try the Europe version if nobody has any input on the problem.

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