Seems like I'm not getting any shares from the pool, 'My hashrate' is 0

My miner is running fine (dual 6990, 4 Mh/s+) Any idea why?
GPU_MAX_ALLOC_PERCENT=100
sgminer -k x13mod -o stratum+tcp://sum2-stratum.pool.mn:7840 -u ress.1 -p xxx -I 17 -g 4 -w 128
Check your hw errors and wu in sgminer, you've probably got loads of hw errors and no shares but it'll still show hashing. I can't get any of my 4 280x's working, they're just getting hw errors.