Good day, I'm having some problems with some NDS Roms that I downloaded and copied to my R4DS. Some games work and some games don't, such as Plants vs. Zombies and Dragon's lair, on the screen says [Rom loading failed] load rom errorcode=-4. Does this mean that no matter where I download the NDS Roms of said titles it still won't work? The firmware I'm using is ver. 1.38, your help will be very much appreciated.