378.53 Dual Wan issue

[clvk07]

Hi it seems that the dual wan is not working. If I unplug the main wan cable it doesn't fail over. I tried with Huawei e220 and k3502. They work from a PC. Anything that can help me to find out the reason? Can not see much in the log...

here the log

May 5 18:30:09 WAN(0) Connection: Ethernet link down.
May 5 18:30:09 stop_nat_rules: apply the redirect_rules!
May 5 18:30:10 rc_service: wanduck 444:notify_rc restart_wan_if 1
May 5 18:30:18 pppd[3298]: pppd 2.4.7 started by admin, uid 0
May 5 18:30:19 rc_service: wanduck 444:notify_rc restart_wan_if 0
May 5 18:30:19 kernel: Attempt to kill tasklet from interrupt
May 5 18:30:19 kernel: device eth0 left promiscuous mode
May 5 18:30:19 kernel: br0: port 1(vlan1) entering forwarding state
May 5 18:30:19 kernel: device eth0 entered promiscuous mode
May 5 18:30:19 kernel: br0: topology change detected, propagating
May 5 18:30:19 kernel: br0: port 1(vlan1) entering forwarding state
May 5 18:30:19 kernel: br0: port 1(vlan1) entering forwarding state
May 5 18:30:19 miniupnpd[982]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
May 5 18:30:19 miniupnpd[982]: Failed to get IP for interface eth0
May 5 18:30:19 miniupnpd[982]: SendNATPMPPublicAddressChangeNotification: cannot get public IP address, stopping
May 5 18:30:20 dnsmasq[469]: read /etc/hosts - 5 addresses
May 5 18:30:20 dnsmasq[469]: read /etc/hosts - 5 addresses
May 5 18:30:22 rc_service: wanduck 444:notify_rc restart_wan_if 1
May 5 18:30:22 dnsmasq[469]: read /etc/hosts - 5 addresses
May 5 18:30:22 pppd[3298]: Child process /bin/comgt -d /dev/ttyUSB0 -s /etc/ppp/3g/Generic_conn.scr (pid 3303) terminated with signal 1
May 5 18:30:22 pppd[3298]: Connect script failed
May 5 18:30:23 pppd[3298]: Exit.
May 5 18:30:30 pppd[3806]: pppd 2.4.7 started by admin, uid 0
May 5 18:30:30 WAN(1) Connection: Fail to connect with some issues.
May 5 18:30:34 rc_service: wanduck 444:notify_rc restart_wan_if 1
May 5 18:30:34 pppd[3806]: Child process /bin/comgt -d /dev/ttyUSB0 -s /etc/ppp/3g/Generic_conn.scr (pid 3826) terminated with signal 1
May 5 18:30:34 pppd[3806]: Connect script failed
May 5 18:30:35 pppd[3806]: Exit.
May 5 18:30:43 pppd[4329]: pppd 2.4.7 started by admin, uid 0
May 5 18:30:44 rc_service: wanduck 444:notify_rc restart_wan_if 0
May 5 18:30:44 dnsmasq[469]: read /etc/hosts - 5 addresses
May 5 18:30:44 kernel: Attempt to kill tasklet from interrupt
May 5 18:30:44 kernel: device eth0 left promiscuous mode
May 5 18:30:44 kernel: br0: port 1(vlan1) entering forwarding state
May 5 18:30:44 kernel: device eth0 entered promiscuous mode
May 5 18:30:44 kernel: br0: topology change detected, propagating
May 5 18:30:44 kernel: br0: port 1(vlan1) entering forwarding state
May 5 18:30:44 kernel: br0: port 1(vlan1) entering forwarding state
May 5 18:30:47 dnsmasq[469]: read /etc/hosts - 5 addresses
May 5 18:30:50 pppd[4329]: Serial connection established.
May 5 18:30:50 pppd[4329]: Using interface ppp0
May 5 18:30:50 pppd[4329]: Connect: ppp0 <--> /dev/ttyUSB2
May 5 18:30:53 rc_service: wanduck 444:notify_rc restart_wan_if 0
May 5 18:30:53 kernel: Attempt to kill tasklet from interrupt
May 5 18:30:53 kernel: device eth0 left promiscuous mode
May 5 18:30:53 kernel: br0: port 1(vlan1) entering forwarding state
May 5 18:30:53 kernel: device eth0 entered promiscuous mode
May 5 18:30:53 kernel: br0: topology change detected, propagating
May 5 18:30:53 kernel: br0: port 1(vlan1) entering forwarding state
May 5 18:30:53 kernel: br0: port 1(vlan1) entering forwarding state
May 5 18:30:55 dnsmasq[469]: read /etc/hosts - 5 addresses
May 5 18:30:57 rc_service: wanduck 444:notify_rc restart_wan_if 1
May 5 18:30:57 dnsmasq[469]: read /etc/hosts - 5 addresses
May 5 18:30:57 pppd[4329]: Hangup (SIGHUP)
May 5 18:30:57 pppd[4329]: Terminating on signal 15
May 5 18:30:58 pppd[4329]: Terminating on signal 15
May 5 18:31:07 pppd[4874]: pppd 2.4.7 started by admin, uid 0
May 5 18:31:11 rc_service: wanduck 444:notify_rc restart_wan_if 1
May 5 18:31:11 pppd[4874]: Child process /bin/comgt -d /dev/ttyUSB2 -s /etc/ppp/3g/Generic_conn.scr (pid 4877) terminated with signal 1
May 5 18:31:11 pppd[4874]: Connect script failed
May 5 18:31:22 rc_service: wanduck 444:notify_rc restart_wan_if 0
May 5 18:31:22 rc_service: waitting "restart_wan_if 1" via wanduck ...
May 5 18:31:22 pppd[5530]: pppd 2.4.7 started by admin, uid 0
May 5 18:31:24 dnsmasq[469]: read /etc/hosts - 5 addresses
May 5 18:31:24 kernel: Attempt to kill tasklet from interrupt