f_opendir (/snes9x/roms) failed ...
I had this error message and no matter what I tried would work, I finally attempted using the 2 GB Kingston Micro SD card, that I used for my nds, with a regular SD adapted instead of the crappy 16 MB card I was trying to used earlier and now it works perfectly. I'm assuming that when you get that error message is means that you are having SD card problems, so I would try using a larger, or different card.
I had this error message and no matter what I tried would work, I finally attempted using the 2 GB Kingston Micro SD card, that I used for my nds, with a regular SD adapted instead of the crappy 16 MB card I was trying to used earlier and now it works perfectly. I'm assuming that when you get that error message is means that you are having SD card problems, so I would try using a larger, or different card.