[CentOS] NTP

Hi folks,

    Have there been any changes to the way ntpd behaves in the past few 
updates?  Reason I ask, whenever I run the ntpq or ntpdc, I immediately 
get a response of Name or service not known.  I know things used to work 
sometime back, and never saw this kind of stuff.  Nothing has changed in 
the /etc/ntp.conf file, nor has anything changed in the 
/etc/ntp/ntpservers files.

T hanks......

Sam