Change Fortigate 80C to Fortigate 80E and now we can't go out to internet

Hi all, I need help with this issue:

We have a fortigate 80C and we acquire a fortigate 80E and we charge it all configuration on this last one. When we change the connection of our ISP to WAN1 in the Fortigate 80E, the fortigate can acces to internet but any computer from our red can't acces to the internet. We reset the Fortigate 80E again to erase any configuration and we setting only the basic to acces to internet but even with this we can't acces to internet. This is what we have setting in the router 80E: config system interface     edit "wan1"         set vdom "root"         set ip xxx.xxx.xxx.xxx 255.255.255.252         set allowaccess ping https http fgfm         set type physical         set role wan         set snmp-index 1     next By default DNS’s of Fortigate config system dns     set primary 208.91.112.53     set secondary 208.91.112.52 end config firewall policy     edit 1         set name "INTERNET"         set uuid 61394098-8487-51e8-f1de-1075f1a12a3a         set srcintf "lan"         set dstintf "wan1"         set srcaddr "all"         set dstaddr "all"         set action accept         set schedule "always"         set service "ALL"         set logtraffic all         set nat enable     next config router static     edit 1         set gateway xxx.xxx.xxx.xxx         set device "wan1"     next end config router policy     edit 1         set input-device "lan"         set src "192.168.X.X/255.255.255.0"         set output-device "wan1"     next

With this settings if we put in a PC the DNS's of google , this PC can access to the Internet. The problem sould be DNS but with the fortigate 80C works fine.

Thanks in advance.