VPN300 - Nat not working at all, no matter if policy control is enabled or not.

Hi all, this router is being a headache so far, but it is what i have to use so... let's see if i can get help to make it work:

I am opening a port on NAT like this:

Ph port GE3 belongs to the WAN2 ISP connection.

I have tested to disable Policy control but just in case, here's the rule created

It does not work. I changed already the www management service to a different port (both http and https)

Also i've tried opening a different service on another port number with no luck.

If i attach the service to the ISP router directly, i can make it work with no problem NAT work on the isp routers with no issues.