I'm not using an ISP router, just an ISP cable modem and have it connected to 7210N in AP Router mode. It works fine in that configuration. I can connect to that from my house with our laptops but...

OK, I will change my root 7210n device, with IP of 192.168.0.253, subnet mask 255.255.255.0, channel 6, (main building) from "AP Router" mode to "AP" mode, but leave it connected to my cable modem...

I ask because I have bought 2 7210Ns and have the first set to AP Router, connected to isp cable modem. That is working good, but using the second 7210 at the receiving end isn't working. Thanks for...