DHCP client service does not start

I have just installed Vista Business on one of my machine. After adding this
machine to domain (Windows 2003 Server Std. with SP2), my DHCP client service
stop running. I tried to run it manually but getting an error "Windows could
not start the DHCP client service on Local Computer. Error 5: Accesss is
Denied". This service is Log on as Local Service. I tried changing the Log on
account as well but getting a different error message "Windows could not
start the DHCP client service on Local Computer. Error 1079: The account
specified for this service is different from the account specified for other
services running in the same process." My other Windows XP machines are
working perfectly fine on domain. Please help me as I almost get stuck with
this issue.