i have one of the hosted web sites on my server with an issue, when i browse http://www.domain.com it sometimes works and sometimes it doesn't, but when i browse http://domain.com the domain wasn't found, i have 2 nameservers and this domain is registered with the IP of the first one of them , but when i ping it, it returns the second and when i reverse host lookup it , it returns both ip for these nameservers , at the time it returns one (first) for all other websites , any comment ?