Hello Guys

cgminer 3.7.2
I have a GTX770 120-150KH/s - 98% Load for a couple of hours
Wanted to test before I switch to AMD

My Hashrate on the website: 0 Kh/s
and 100% rejected showing on the website

And on cgminer: Rejected 01axxxxxxx Diff 154/15 ......(damn didnt get the rest of it)

Is it maybe because I have an IPV6 Provider and can`t PortForward?
but cgminer is working fine - gets blocks from stratum pool 0, adjusts difficulty, switches through the altcoins...

I have no clue what to try or do