routing instance and ospf

Hello! Trying to configure ospf on srx100 device with routing-instance enabled, everything works fine between devices without routing instance.

show routing-instances 
cifra1 {
    instance-type virtual-router;
    interface st0.0;
    interface st0.4;
    interface st0.8;
    interface vlan.1;
    routing-options {                   
        interface-routes {              
            rib-group inet cifra1;      
        }                               
        static {                        
            route 0.0.0.0/0 next-hop 212.152.36.217;
            route 172.17.0.0/16 next-hop 192.168.9.3;
            route 192.168.10.0/24 next-hop st0.8;
            route 192.168.11.0/24 next-hop st0.4;
        }                               
    }                                   
    protocols {                         
        ospf {                          
            rib-group cifra1;           
            area 0.0.0.0 {              
                interface st0.4;        
                interface st0.8;        
                interface vlan.1;                    
            }                           
        }                               
    }                                   
} 

All protocols are allowed in trust zone.

But

run show ospf neighbor instance cifra1  

is empty.

run show ospf interface instance cifra1   
Interface           State   Area            DR ID           BDR ID          Nbrs
st0.4               PtToPt  0.0.0.0         0.0.0.0         0.0.0.0            0
st0.8               PtToPt  0.0.0.0         0.0.0.0         0.0.0.0            0
vlan.1              DR      0.0.0.0         10.12.31.1      0.0.0.0            0
vlan.1              DR      0.0.0.0         10.12.31.1      0.0.0.0            0

Any ideas why?