a lot of DCR rejects with command
EthDcrMiner64.exe -epool eth-ru.dwarfpool.com:8008 -ewal eth.wallet -epsw x -eworker workername1 -dpool http://dcr.suprnova.cc:9111 -dwal login.workername -dpsw 1111
DCR - Total Speed: 199.542 Mh/s, Total Shares: 120, Rejected: 20
DCR: GPU0 199.542 Mh/s
what's wrong?