Wireless Network problem

[Ika]

Hello. With Linux basically starting out.
So I installed CentOS 5.9 on a Dell D610. After I found out that the Wifi card is not supported I bought Intel Pro Wireless 2200 (ipw2200).
And then I installed the Wifi using CentOS Wiki (http://wiki.centos.org/HowTos/Laptops/Wireless # head-7120b8469149d0d562a134fd201f3af4bbf45048). Installing the package was OK. But if i move to Network Settings, and I will activate eth1 Wireless, jumps out at me quote: "The device eth1 unreliable MAC address. Ignore". Could you please advise me how to fix it? I just getting started with linux. Please compassion with me. Thanks for advices.