I have started mining using an nvidia gtx 670m GPU. I have compiled cudaminer and started mining on the slush pool. However, during mining I always get results similar to:
accepted: 0/X (0.00%), xx.xx khash/s (booo)
accepted: 0/X (0.00%), xx.xx khash/s (booo)
accepted: 0/X (0.00%), xx.xx khash/s (booo)
where X is an increasing counter and xx.xx is the hash rate(usually between 75.00 and 100.00 khash/s). Is this related to networking, more specifically port forwarding? I am asking because the bitcoin-qt client managed to synchronize with the network.