When using your Apple iPhone or iPad, you may get an error that says, “Unable to Join name Network” when you try to connect to a Wi-Fi network. Try the following suggestions to fix this problem.
Check Security Settings
Ensure that the Security setting for your device matches the setting on the wireless router you’re connecting to. (WEP password, WEP hex or ASCII, WPA, or WPA2)
Manually Add Network
The wireless router may not always broadcast the SSID. In this case, you must learn what the SSID is, and enter it manually under “Settings” > “Wi-Fi” > “Other “.
Check Router Settings
Security settings on the router can lock you out such as MAC address filtering. Research whether or not there are these types of restrictions on the wireless router.
Reset Network Settings
If all else fails, you may need to reset your network settings on the iPod Touch. Clearing things out and starting over sometimes can work wonders. Open “Settings” > “General” > “Reset” and select “Reset Network Settings“.