Having some issues with AM Prisma using the USB adapter

Cgminer 4.7.1
Rasp Pi running latest wheezy
compiled using: --enable-blockerupter --enable-icarus --without-curses

./cgminer -o stratum+tcp://us1.ghash.io:3333 -u xxxx -p xxxx --bet-clk 23

Cgminer spits out a bunch of errors

[2014-11-06 17:44:02] BET0: Unexpected value 00 received                   
[2014-11-06 17:44:02] BET0: Sync Error                   
[2014-11-06 17:44:02] BET0: Unexpected value 58 received                   
[2014-11-06 17:44:02] BET0: Sync Error                   
[2014-11-06 17:44:02] BET0: Unexpected value 58 received   

it then segfaults after a little bit.

I am not sure if my cgminer command is wrong or the USB dongle is the issue.. I have tried plugging directly into Pi and also a power USB hub with the same results.