I do not understand from your post if you successfully authenticated to the wifi router or not…
You say you saw the AP so the scan and hence the wifi card work but you say network connection is unavailable so I guess it’s a misconfiguration from your side.
Have a look here for a step by step instructions with relevant informations. You can start at 20.5 but I’d suggest to read it throughly.
Did you already disable NetworkManager from Yast?
What ifconfig -a shows?
What’s the content of /etc/resolv.conf (did the router send you the dhcp ip / gw and dns) ?
Cheers.