Mihamina

Make sure your /etc/sysconfig/network-scripts/wlan0 (or eth1, whatever your interface may be) has the boot at enable option

On CLI as root:

iwconfig mode Managed

iwconfig ssid myessid

dhclient wlan0 (or whatever your interface may be)

That would make it work but if you have a DE use NetworkManager since you don't need to be root to issue the commands && once you've logged in to an essid i. e home, work, coffe-shop whatever it will remember for the next time.

Edik