IPhone 4S unable to connect to channel 13 unsecured Wi-Fi?

Hi when I try to connect my iPhone 4S to a channel 13 Wi-Fi network (Unsecured) i get the error message "Unable to connect to *wi-fi name*" I'm using iOS 6.0.1? Anyone else having issues?

Do you own the Wi-Fi network? If you do, log into the wireless access point and see what authentication settings on it
Can you connect to any other Wi-Fi networks? If you can then its the Wi-Fi networks settings that are preventing you.

Although the Wi-Fi network may appear unprotected it may have MAC address authentication on, or a number of other authentication options enabled.

I have had problems but i found out i was typing in the wrong pasword