Help with comunication in IPSEC VPN

Hi everyone, thanks for your help in advance. First of all i must to say i'm really newbie working with SonicWall.

At this moment i'm trying to comunicate 2 sites with VPN IPSEC beetween Fortigate <--> SonicWall working OK right now.

But i'm being mad because i dont know where i have my fault. 

To get in situation:

I have the following addressing:

FGT Network: 10.240.0.0/24

SW Network: 192.168.20.0/24

With the tunnel VPN Working, i have ping beetween: FGT network --> SW network. But not the other way arround. 

Now i need to comunicate from SW network --> FGT network.

I fact i made the policy rules and the routes but not working by far.

Any idea?