This might only be a display problem with rounding the numbers. Can you check, if you can find string "0.000" in your sph-miner logs? If you're not using logs, please start sph-miner with logging:

"sgminer ...your-parameters... 2>>sph-miner.log"

And then monitor your log ... if you'll find string "0.000" in the logs please send the logs to nicehashdev.