Android core path blues

Hi

I moved the cores directory to /mnt/external_sd/retroarch/cores, then changed the config to point to the new place, but when I restart it will point to the old location, and changing the path to point to the right place and trying to load a core would end up with nothing, RA keep saying No Cores Loaded, and trying to load a rom and choosing a core will crash RA.

I also moved the Asset dir and have no problem with it, RA remembers the path and loads the assets from there.