The stock kernel driver to use with the WPC11 is the orinoco_cs. Make sure that it's loaded.
If you get some error messages after executing modprobe, insure that the wavelan_cs and wvlan_cs drivers are unloaded. By doing
lsmod | egrep lan
If they are loaded do the following:
The hack is putting the following in
card "Instant Wireless Network PC Card"
Go to the Redhat System Tools and hit Configure. Then add a wireless device in Managed mode if you have an access point.
Setup dhcp, and the WEP key. The channel autoconfigures to 6 in managed mode.