It is not clear from your output, do you have vlan 4000 setup as as service vlan?
show configuration vlans qinqvlan
show vlans qinqvlan extensive
http://www.juniper.net/documentation/en_US/junos12.3/topics/example/qinq-tunneling-ex-series.html
It is not clear from your output, do you have vlan 4000 setup as as service vlan?
show configuration vlans qinqvlan
show vlans qinqvlan extensive
http://www.juniper.net/documentation/en_US/junos12.3/topics/example/qinq-tunneling-ex-series.html