Fixed diff? Maybe a bit to high? Miner says "server set difficulty to: 000078787878787878787878" and only a few shares get send....
I see you've catched a big one. Doing 3/4 off total hashrate.
Vardiff or manual diff would be nice. I'm getting new works but not submitting any shares.
Yup, 5586 is the correct port, use 5587 for Nicehash. I've fixed it on the pool and posted it in the header as well.