Why is vendor option not being sent?

[John Hascall]

Config excerpt:

option space CiscoLWAP;
option CiscoLWAP.controller code 241 = ip-address;
class "CiscoLWAP-c1500" {
  match if option vendor-class-identifier = "Cisco AP c1500";
  option vendor-class-identifier "Cisco AP c1500";
  vendor-option-space CiscoLWAP;
  option CiscoLWAP.controller 10.10.251.247;
}

host ap-test.tele.iastate.edu {
  ddns-hostname "ap-a60easttowerciscolap1510-01";
  ddns-domainname "tele.iastate.edu";
  option domain-name "tele.iastate.edu";
  fixed-address 10.10.199.130;
  hardware ethernet 00:0b:85:7f:43:d0;
# tried them here too
# vendor-option-space CiscoLWAP;
# option CiscoLWAP.controller 10.10.251.247;
}

Request:

09:30:08.819749 IP (tos 0x0, ttl 254, id 38989, offset 0, flags [none], proto UDP (17), length 299) 129.186.199.158.67 > 129.186.1.16.67: [udp sum ok] BOOTP/DHCP, Request from 00:0b:85:7f:43:d0, length 271, hops 1, xid 0x36a665c6, Flags [none] (0x0000)
          Client-IP 10.10.199.130
          Gateway-IP 129.186.199.158
          Client-Ethernet-Address 00:0b:85:7f:43:d0
          Vendor-rfc1048 Extensions
            Magic Cookie 0x63825363
            DHCP-Message Option 53, length 1: Inform
            MSZ Option 57, length 2: 590
            Parameter-Request Option 55, length 5: 
              Default-Gateway, Vendor-Option, Domain-Name-Server, Domain-Name
              LOG
            Vendor-Class Option 60, length 14: "Cisco AP c1500"
            END Option 255, length 0

Reply:
09:30:08.822777 IP (tos 0x0, ttl 64, id 14216, offset 0, flags [none], proto UDP (17), length 328) 129.186.1.16.67 > 10.10.199.130.68: [udp sum ok] BOOTP/DHCP, Reply, length 300, hops 1, xid 0x36a665c6, Flags [none] (0x0000)
          Client-IP 10.10.199.130
          Gateway-IP 129.186.199.158
          Client-Ethernet-Address 00:0b:85:7f:43:d0
          sname "netreg-1.its.iastate.edu"
          Vendor-rfc1048 Extensions
            Magic Cookie 0x63825363
            DHCP-Message Option 53, length 1: ACK
            Server-ID Option 54, length 4: 129.186.1.16
            Default-Gateway Option 3, length 4: 129.186.199.158
            Domain-Name-Server Option 6, length 12: 129.186.78.200,129.186.1.200,129.186.140.200
            Domain-Name Option 15, length 11: "iastate.edu"
            Subnet-Mask Option 1, length 4: 255.255.255.224
            END Option 255, length 0
            PAD Option 0, length 0, occurs 11