dscl merge on Leopard Server

I trying to use dscl -u -p /LDAPv3/127.0.0.1 merge /Groups/adusers GroupMembership adclient When I do this, I receive this error message. Cannot open remote host, error: DSOpenDirServiceErr The account I'm using for the merge is the account I created when starting the OD Master. It has full rights.. thanks for any info