First of all, We should thanks to Spidel for take time to prepare that solution conveniently. It may NOT be official answer but since there is no any official answer for it's solution except mailing, then Spidel's explanation is great and considerable.
again, Spidel's answer is not supported by CService, The official answer is below, Spidel's answer is an option, so is using googles free DNS servers, in the end tho, if the problem is to be sorted properly, it needs to go through dudu.
Sorry the official answer to this problem is users should contact the Bucharest server admin dudu (nickname on irc). This is so he can work with the user and RDS staff to get the problem fixed properly. The above is a workaround, and only a temporary solution, and is not the answer CService can supply.