i have one of the hosted domains on my server with an issue, when i browse http://www.domain.com sometimes it works and sometimes it doesn't showing the apache index page, 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 as all other hosted websites, 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 ?