An offline server still appearing in DHCP Autherisation List

Hi,
We are not able to remove a DHCP server from the DHCP authorisation list.
we used NETSH DHCP DELETE Server command but got the error 'there is no such
object on the sever.' I used Adsiedit.msc and checked
cn=netservices,cn=services,cn=configuration,dc=dom ain,dc=com but
unfortunately,I was not able to see the information (IP and name) of the DHCP
server in the dHCPClass object.How can we remove this entry from the
authorised server list?(The replication is working fine between the AD
servers.).Any help will be appreciated.
Regards,
Bineesh