Group policy not working in domain enviroment

hello all,i’m still new in domain environmet,
i have done installed windows 2003 server,then i applied group policy for my new domain,the ,method that i used is go to ADUC-right clik domain name-properties-group policy-default domain controller.there i edit to phohibit user to acces control panel and cmd..The question is the policy that i have configured just applied on my server not for client pc and setting..please advice..thanks