System trying to connect to all visible wireless networks


I’m used to Ubuntu and I’m quite new to OpenSuse. I just installed OpenSuse 11.0 on a laptop and I don’t know what option I activated but every time I start the computer or that a new wireless network becomes available in the range of the laptop, there is a window that pop-ups to ask me the password to connect to it.

How can I easily remove this annoyance and connect to a wireless network only when I select it in the list of available networks?