I am mining with the avalon nano, I dont understand what the different is then. I thought that the avalon's were a type of block eruptor.

I am trying to get the the avalon to work with bfgminer.

I am new to the cryptocurrencies, for xmas I got two Avalon nano block erupters and using a raspberry pi that will run the block erupters, the pi is running rasbian with all the updates. I downloaded the bfgminer from github, and this is where I have come into issues, the Nano's are not being detected in the miner. I have tried activating each group of drivers that is build in bfgminer and nothing seems to be working. I am at a lost on what to do to get this erupters working. When use the command lsusb the erupters show up. So why cant bfgminer find the erupters? Has anyone else had this issue? If so can you help with this issue.
Thanks