Thanks for answer BarryG, you're right, i have multiple ISPs. Both firewall converter connect directly to eth2 ( firewall 1 ) and eth1 ( firewall 2 ). Did I miss some steps ? How to solve ? Waiting your answer ....
One site uses AES-128, and the other uses AES-256. If fixing that doesn't solve the problem, then it's time to look at the IPsec log to see when the connection attempt fails.