I cant solo mine this! url error..
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
sgminer -k myriadcoin-groestl -o 127.0.0.1:6420 -u DBWCQ88YLZk1HHh4LKbqAfTXmthMWNaRGz -p xxx -I 19 -g 4 -w 64

Is this ok?