Bingo. You have the router set to

by R. Proffitt Moderator - 4/10/12 10:35 AM

In Reply to: About wifi channels by WinAndLinuxTutorials

The rest of the world.

http://en.wikipedia.org/wiki/List_of_WLAN_channels

Now Auto is JUST FINE but let's say the router picks channel 13 and your device is set to NA. It might connect if close enough because of overlap then drop.

It sounds like this are is new to you which is fine. Just check your device and see if it is set to the rest of the world so it can get those other channels.
Bob