I've recently registered a .ws domain name. I added the nameservers of my host (000webhost) and have verified that they are correct. I haven't had any problems with them before.
The problem is that whenever I try and access my website (fizz.ws), I either get redirected to website.ws, which is the central registrar for .ws domains or I get a Not Found error from dynadot.
The name servers look good and the website seems to be online now. Perhaps you just needed to allow some time for the changes to propagate or for your cache to clear.