In others Firmware the "SSID Isolation" is called "Guest Network". I've a LAN with 192.168.1.x ip class. On the TP-Link EAP110 I will be to create two WIFI Network one private with the access to...

I set the Wifi with the SSID Isolation, like the attached image. Then I connect a laptop to the "isolated" Wifi but I can Ping the machines in the Lan, so the Isolation don't work.

I have setted the Wifi Network with SSID Isolation for a Guest Access but It's don't work. I see other devices in the net. I've Upgraded the Firmware to the last Verion but the isolation don't work....