FGSP over UDP/708 doesn´t work

[snobs]

Hello, I setup FGSP on 2 Fortigates. Connecting both units directly and start ethernet-based FGSP, it works. Synchronizations over UDP doesn´t work at all. Do what is missing to get UDP based FGSP working?

[ul]

Current state on Fortigate 1[/ul]

port9: 10.5.22.1
config system ha
    set hbdev "port9" 0
    set session-sync-dev "port9"
    set session-pickup enable
    set session-pickup-connectionless enable
    set session-pickup-expectation enable
    set session-pickup-nat enable
    set standalone-config-sync enable
    set override disable
    set priority 250
end
config system cluster-sync
    edit 1
        set peerip 10.5.21.1
        set syncvd "vdom1"
    next
end

diagnose sys session sync
sync_ctx: sync_started=1, sync_tcp=1, sync_others=1,
sync_expectation=1, sync_redir=0, sync_nat=1, stdalone_sesync=1.
sync: create=0:0, update=0, delete=0:0, query=0
recv: create=0:0, update=0, delete=0:0, query=0
ses pkts: send=161176, alloc_fail=0, recv=0, recv_err=0 sz_err=0
udp pkts: send=0, recv=0
nCfg_sess_sync_num=5, mtu=1500
sync_filter:
    1: vd=1, szone=0, dzone=0, saddr=0.0.0.0:0.0.0.0, daddr=0.0.0.0:0.0.0.0, sport=0-65535, dport=0:65535

[ul]

Current state on Fortigate 2:[/ul]

port9: 10.5.21.1

config system ha
    set hbdev "port9" 0
    set session-sync-dev "port9"
    set session-pickup enable
    set session-pickup-connectionless enable
    set session-pickup-expectation enable
    set sesson-pickup-nat enable
    set standalone-config-sync enable
    set override disable
    set priority 255
end

config system cluster-sync
    edit 1
        set peerip 10.5.22.1
        set syncvd "vdom1"
    next
end

diag sys session sync
sync_ctx: sync_started=1, sync_tcp=1, sync_others=1,
sync_expectation=1, sync_redir=0, sync_nat=1, stdalone_sesync=1.
sync: create=0:0, update=0, delete=0:0, query=0
recv: create=0:0, update=0, delete=0:0, query=0
ses pkts: send=161500, alloc_fail=0, recv=159822, recv_err=1 sz_err=0
udp pkts: send=0, recv=0
nCfg_sess_sync_num=5, mtu=1500
sync_filter:

    1: vd=1, szone=0, dzone=0, saddr=0.0.0.0:0.0.0.0, daddr=0.0.0.0:0.0.0.0, sport=0-65535, dport=0:65535

So, the Fortigate doesn´t start sending packets over UDP? What am I missing?