Sounds like the T2x is NOT on the network.

Right-click on the T2x in Integration Designer; go to the 802.11 tab. Check that "Enable Wireless Network Adapter" and "Enable Wireless LAN Status LED" are both selected. In the "Network Name (SSID) box, check that you have entered the SSID and password of your wireless network correctly (case matters!). Go to the "Network" tab and make sure that "Use DHCP to configure networking" is selected.

Then upload via USB to the T2x so that those settings will be loaded. Let it reboot, and then scan the network from a device connected to the same wireless network (use an iOS or Android device running Fing). You should see the Status LED on the T2x lit, and be able to find the T2x MAC and IP address listed in your network scan.