I'm running RPi 2, with EDIMAX wifi dongle. LAN works fine, and cannot connect properly to my wifi Dongle. Can someone help me!

###### System info ######
Linux version 4.1.20-1-ARCH (builduser@leming) (gcc version 5.3.0 (GCC) ) #1 SMP Sat Mar 19 20:07:23 MDT 2016
system time: Fri Nov 18 14:26:01 CET 2016
system load: 0.07 0.10 0.06 1/157 1280
HW platform: RaspberryPi2 (08)