you are missing one parameter
--scrypt so it should be like this
...
./bfgminer --scrypt -S opencl:auto -o stratum+tcp://pool.d2.cc:3335 -u ....
bfgminer by default wants to mine bitcoins, by --scrypt you will turn on scrypt mining and by -S opencl:auto you will say he should notice also GPUs (by default he ignores them).
Hope it helped