Pi's are notoriously bad for having weak USB ports. Are you using a powered hub? If so, what kind/what is the power supply/ac adapter specs (volts, amps)?
the 4 BE's are in a powered hub, i believe its a 7 port hub with a 5a power supply (i could be wrong as i am not at home at the moment) and the BFL is plugged directly into the pi. I also even tried plugging the 2 extra BE's i have into a second powered hub but had the same results.