Okay so I haven't updated my software or anything, it's still running on ver. 4.5.0-8U and the Gateway 3DS with the latest updates worked as of this morning, like less than an hour ago I was playing Animal Crossing: New Leaf, but when I played an actual NDS game (Pokemon Black Version 2) on the realNAND, the exploit (pressing L while clicking on the Nintendo DS Profile settings) stopped working and I can't boot into Gateway mode. Does anyone know what went wrong because I'm actually kind of really concerned, any help would be appreciated.