URL with and without www

[bhwong]

Hi,

If I add a site and put my domain as www.domain.com, domain.com will not go to my website but to ISPConfig's "It's works!" page. If I change my domain to domain.com, www.domain.com will not go to my website but to ISPConfig's "It's works!" page.

So how do I make sure that both domain.com and www.domain.com go to my website instead of ISPConfig's "It's works!" page?