You need to make sure your nameservers point to your server. Just adding them in Sentora in not enough. Here is an example of how to do it at your registrar for your main account if using single IP: http://docs.sentora.org/?node=95
The same process can be used for multiple server IPs just by changing the ns2 IP to your second IP if you have one.
The same process can be used for multiple server IPs just by changing the ns2 IP to your second IP if you have one.