i try to mine this coin but all rejected 100% on 280x ..what i am doing wrong..all other coins work nomrlany ..i used that cgminer for heavy and this is bat

cgminer.exe --heavy -o stratum+tcp://pool1.heavycoin.zhpool.com:20001 -u **** -p ***  --vectors 1 -I 8  -w 256  --gpu-powertune 20