I registered a reseller account with weblinenet using my domain potencialweb.com.
Weblinenet asign to me this NameServers:
ns1.serverbox3.com
ns2.serverbox3.com
But I want to setup my own nameservers ns1.potencialweb.com and ns2.potencialweb.com.
How can I do this?

all you need is to tell weblinenet if they provide DNS services to purchase..
if they dont have, then you can't

Who you register with for your domain name? then you will need to ask the company to create the name server for you, as well you need 2 static IP.