3DS GBA Save Backup and Restore with GodMode9

hey insanenutter, tried this today on my 2dsxl that i bought last year modded, i had no issues extracting and playing the save on pc, but after trying to re inject, no joy, it does work on mgba, i saved it from there and put it on the 2ds again, inject fail every time. the file is the correct size and it runs on mgba correctly. Not sure what im missing. Hope you can help