Vpn only on direction, but i need both direction: makes me mad!

[cybermod]

Hi all,
i don't know if my problems is: NAT (outbound), firewall, VIP or ipsec or Others…. but i know that i am really in trouble.

my vpn IPsec begins only in one direction!!!!!!

i have two pfsense, i will call them pfsenseA and pfsenseB.

pfsenseA:
it has one public ip and two lans (lanA and lanB, and each lan is a gateway for some clients). each lan comes out with the same public ip

pfsenseB:
it has some virtual ip (vipA and vipB) and two lans (lanA and lanB, and each lan is a gateway for some clients). each lans comes out with his public ip.
it has the outbound nat rule:

• all traffic from lanA comes out with vipA
• all traffic from lanB comes out with vipB
  This works correctly

The IPsec tunnel is between lanA of pfsenseA and lanA of pfsenseB

When I try to call the vpn from lanA of pfsenseB, to pfsenseA, it works
When I try to call the vpn from lanA of pfsenseA, to pfsenseB, it not works

I have not idea where is the problem, but i have spent too time and this problem block my project (and it makes me mad!!!!)

Please, help me to resolv it, is very important