You are not using --scrypt
i use --scrypt!!!
here is the start process
export DISPLAY=:0
export GPU_MAX_ALLOC_PERCENT=100
export GPU_USE_SYNC_OBJECTS=1
./bfgminer --scrypt -o stratum+tcp://xxxxxxx -u xxxxxxxx -p x --intensity=14 --gpu-engine 625 --gpu-memclock 533 --shaders 160 --thread-concurrency 3000