Two Active Big IP's in HA mode

is unicast-address on device configured correctly? is network-failover enabled on device-group? is there any useful message in /var/log/ltm?

e.g.

root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list cm device ve11a.acme.local unicast-address
cm device ve11a.acme.local {
    unicast-address {
        {
            effective-ip 200.200.200.11
            effective-port 1026
            ip 200.200.200.11
            port 1026
        }
    }
}

root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list cm device-group dg network-failover
cm device-group dg {
    network-failover enabled
}