[Openswan Users] can't see tunnel is up

[Tan Weng Leong]

   I have configure the openSWAn with the following setup : 


client A -----server A========Server B--------- client B 

i can ping from client A to client B and versa vice. when i type service 
ipsec status i have the following messages :
    IPsec running
    pluto pid 6719
    No tunnels up 

can someone solve my problem? thank you.