Three networks - two routers

Hi, guys!
My first post.
At home I need to make two subnets of the network, that my ISP provides. I have one router with default mask for WAN 255.255.255.0 and 85.xxx.xxx.xxx IP, named networkONE and default for LAN 255.255.255.0 with 192.168.1.1 IP. I have one more router which is connected to the first one via wireless and has WAN (the LAN of the first is actually WAN for this one) mask 255.255.255.0, named networkTWO with 192.168.1.100 and LAN mask 255.255.255.0 with IP 192.168.2.1. Why when I connect to the main network (networkONE), I see all the open ports of the networkTWO router and it forwards me (I set it to forward me), but the router is UNPINGABLE. What settings should I use?