[BlueOnyx:05635] different hostname one same site

[Gareth Thomas]

hey guys.   i have a question   more than likely a very stupid  
question but one im puzzled over

i have a client who has his website at

  www.(random text).co.uk

he also wants the site to be directed from

(random text).co.uk as well

iv set the dns up  and added it in the domains control panel but it  
still wont work   am i missing somthing

thanks for any help

gareth