[j-nsp] several vlans under one vpls routing instance

[meryem Z]

hello,

I'm trying to configure serveral sub-interfaces under the same vpls routing instance on junos 9.6 m7i router and 10.3 on M120. but still doesn't work.
with one sub-interface it works fine.
I found some juniper docs on this subject but it was related to mx-series..

my config is as follows:

router> show configuration routing-instances Test_VPLS   
instance-type vpls;
interface xe-5/0/0.100;
interface xe-5/0/0.101;
route-distinguisher 64512:100;
vrf-target target:64512:100;
protocols {
    vpls {
        site-range 5;
        site Site1 {
            site-identifier 1;
            interface xe-5/0/0.100;
             interface xe-5/0/0.101;
        }
    }
}
what should i add to make it work?

Thank a lot.