3336 is ALIVE for me right now..
well, then I have absolutely no idea what's going on here...
I have also tried to remove the pool and re-add it but it didn't help
If it's alive for me and dead for you, either nicehash banned all and whitelisted me or it banned you or you have connection issues to nicehash.
In either way nothing to be done.. maybe ask nicehash?
Ah, maybe you specified incorrect BTC address? It does go DEAD if it is not valid.
I'll ask them, however it would be strange if only X11 and X13 ports were banned for my IP and also just a few seconds ago I saw X11 to be alive and then dead again as I switched to it, which would imply connection problems, but if I had connection problems to the X11 and X13 ports, I would have the same problems for all other ports as well, since it's the same IP address...