Can someone please help me with mining this coin?

I have all AMD 280x cards. I downloaded x14 miner and am using this command:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
sgminer -k x14 -o stratum+tcp://ganja.suprnova.cc:2307 -u *.* -p * -I 14 -w 256 --thread-concurrency 8192

It immediately crashes