Error opening directory GAMEYOB DS

Hi,

I can't run Gameyob DS with my GW blue card. When I launch it, i have an error message: "Error opening directory"
But all directory and files are still on the SD card and when I use the same SD card with my brother's R4i, gameyob is working without error.
I only have this error with my GW blue card.

Any help?

Thanks