I can't connect to my school's wireless network.

My /etc/conf.d/wireless is as follows:

Code:
#HOME
#wlan_eth2="eth2 essid homerouterssid key ##:##:##:##:##:##:##:##:##:##:##:##:##

#SCHOOL
wlan_eth2="eth2 essid schoolrouterssid key ##:##:##:##:##
When I am at home I connect with no problems - but when I try to connect at school I don't even get a limited IP address. Does anyone have any ideas?