Currently Being ModeratedApr 7, 2012 3:52 AM (in response to Natalie5836)
Check this article about the basic troubleshooting for Wi-Fi:
If your router is transmitting 802.11n, set it to 802.11b/g only, the iPod touch 2nd generation can't connect to 802.11n speed.
Currently Being ModeratedApr 7, 2012 6:50 AM (in response to Natalie5836)
You'll have to get into the setup of the router, have a look at the manual or visit the webpage of the manufacturer.
Usually you'll have to type in the router address in your browser, to enter the setup and check the settings for Wi-Fi.