XG 330 : NAT not working with multi-WAN

Question

Hi, 
 
 I have some trouble with my multi-WAN connexion configured in active/active mode. 
 Nothing go through correctly, and after some research, I found out that the problem is the NAT. 
 But the NAT, for me, looks correct : 
 
 I have two NAT Policy, one for each WAN interface ! 
 
 And when I configure a firewall rule, I use the "Gateway Specific Default NAT Policy" :

And this isn't working.

Thomas Rivenez · Accepted Answer

After some tries, I found a way to make it work :

It is the exact same configuration, with one NAT for each Gateway, but I overrided the default NAT policy (that is in fact not working). 
 
 Hope that will help others !