Hello, a while back i completed a 3DS hacking guide to get FBI on my 3DS along with my brother's. They are both on the same 3ds firmware (11.2U, both the original 3DS). I have an R4 SDHC Dual Core card from 2015, from http://r4isdhc.com/, but it only works on his 3DS but not mine. I get a black screen saying an error occurred. The only things i can think that are different is that for his 3DS, is that he has to take out the SD card or his 3DS wont start, not sure why, and the other is that I have an external battery. Other than that they are exactly the same. Any thoughts why his would work and not mine?