emusonacid! legacy

hi all

my second 6400 ulta has 4.10 os which i would like to upgrade to 4.7 like i did with my other 6400...unfortunatelly the sampler skips the floppy drive and boots up so dont know how can i do that...btw the floppy works since i can spot it in the "browse" section and can read samples that come from this one...i suspect that my flash is burned out in a way but any suggestions would be great...