Have you added wlan0 to your /etc/modules.conf file ... mine looks something like this -
alias wlan0 acx100_pci
The "acx100_pci" is the name of the module that is loaded to run my card.
I am running the D-Link 520+ card on Slackware with the new acx100 OSS drivers ... its working a treat.
I am not familiar with the 120 card but also a hint, have a look in /etc/sysconfig/networking-scripts directory - I am not sure how RH does it but you should have a ifcfg-wlan0 file which probably should look something like this;