nameserverport = 0x00000089(137)
There are several instances of dhcpnameserver and no numbers/values which I can see.
They’re all located under: DHCP > Parameters > Options.
Under Options are eight sub-folders:
1, 15, 3, 44, 46, 47, 6 and DCHPNETBIOSOPTIONS
Your dhcp server should be like an ip i.e. 192.168.0.1 or ?