is this working with prt ?
i tried this to mining prt , but got 100% reject .....

i got it to work at one of the p2pools
sgminer.exe -k quarkcoin --gpu-engine 900 --gpu-memclock 1000 -I 16 -g 2 -w 256 --thread-concurrency 3200 --lookup-gap 2 -o stratum+tcp://prt.npool.org:2300 -u PjGAN5jzGkbAYdZZH6FPkGpCyijFL4WUpN
+1 -u x
make sure to add the +1 to your address and it will give you max diff so that it works right