Use multiple public IPs addresses

Hello there!

In my environment, I have four public IPs, and I have a TMG Firewall working.

When I publish servers by TMG using one of my IP adresses, it works.

But, when I use anyone else, it isn't work.

I'm new in TMG Server, so I want to know if there is some setting to do to use other public IP adresses to publish servers by TMG.

Thanks in advance.

Lucas Gustavo