WinDump not showing CDP VLAN information

I'm traying yo get Native VLAN information using Windupm as follows:

WinDump.exe -nn -v -i \Device\NPF_{55C9305C-C681-49FB-8604-1A7XXXXXXXX} -s 1500 -c 1 "ether[20:2] == 0x2000"

I do get the CDP package, but the VLAN info in not present.

17:49:31.191283 CDPv2, ttl: 180s, checksum: 692 (unverified), length 443
    Device-ID (0x01), length: 34 bytes: 'switch.example.com'
    Version String (0x05), length: 264 bytes:
      Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-IPBASEK9-M)
      Technical Support: http://www.cisco.com/techsupport
      Copyright (c) 1986-2011 by Cisco Systems, Inc.
      Compiled Thu 27-Jan-11 12:19 by prod_rel_team
    Platform (0x06), length: 15 bytes: 'cisco WS-C4900M'
    Address (0x02), length: 13 bytes: IPv4 (1) switch.example.com
    Port-ID (0x03), length: 18 bytes: 'GigabitEthernet0/1'
    Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP snooping
    Prefixes (0x07), length: 5 bytes:  IPv4 Prefixes (1): 10.0.0.0/20
    VTP Management Domain (0x09), length: 0 byte: ''

When using CISCO CDP Monitor (https://www.tallsoft.com/cdpmonitor.htm) that I know uses Windump behind... it shows the VLAN correclty.

What could be the problem? how can I get the complete CPD ?