Cisco Firewall :: ASA5500 Add A Second Outside Connection With Second Provider

ASA-5510, inside, outside, and some DMZ.Some services published with Static NAT - no problem.Now we need to add a second outside connection, with a second provider.Internet navigation only through the first provider (default gateway to the provider router "A").I need to publish some services ALSO through the second provider, ensuring the accessibility of both public IP addresses.I can set up the second NAT on the second interface, but the answer is ONLY to the first IP (the ISP "A", where I have the default gateway).By Cisco manual, it seems that there is a "lookup route" automatic with the return route of NAT, but it does not work.