ROM Hack Rom Loading Failed

[7t7Hound]

I have new and old .nds files that come up with the error code 4 i have an original DSR4 with 1.18 and the Ys menu but the roms wont boot in the main or the Y's menu is here any kind of file update or something please

PS this is what the alphabet would look like if Q & R where removed

thanks for your time