Try connecting form the command line
Make sure you can see the network
then configure from the command line, assuming you your wireless interface is eth0
Code:
/sbin/ifconfig eth0 down
iwconfig eth0 channel 0
iwconfig eth0 mode managed
iwconfig eth0 rate auto
iwconfig eth0 enc off
iwconfig eth0 essid langaracollege
And bring your interface up either using DHCP or a static IP address
Code:
dhcpcd -d -h $(hostname) eth0
or
ifconfig eth0 inet <ipAddress> up