nds rom problems on r4

some if the roms ive use after ive created the save file on the r4 the games starts but says sumfin like cannot access save data turn off ds n reinstert card how do i make the save data work

You need to arm7 patch the roms. Search the forum for more info on this.

https://www.romulation.org/forum/index.php?topic=1462.0

download the latest firmware 1.19.im sure dis will fix ur problem http://r4team.com/eng/r4_v1.19_kernel.htm

it might, but it may well not.