duwal wan problem

hello every one

i have merged to wan lines using pcc method and it works fine but now i need to add a new subnet to interface 4 , up till now all is good the problem is all pc’s in the new subnet can not go to the internet, as i can see the problem is in the mangel roles of the pcc but i have no idea what to do to make this work

interface 1 => wan 1
interface 2 => wan 2
interface 3 => lan 2 ip 192.168.1.0/24
interface 4 => lan 2 ip 192.168.3.0/24