Thanks for your message,
By turning one light to green, your rabbit tells you that he found the network, but was not able to connect to.
This can be due to an error while entering the encrypted key in your rabbit's configuration page, or an error while selecting the encryption type.
Could you please tell me which network appears in the field 'SSID' (on the 'basic' section of your rabbit's configuration page) ?
This selection should also show more informations, as follow:
SSID - Encryption type - Channel - Power.
(i.e.: MyNetwork - WEP encryption - Channel 7 - Power -3)
Feel free to tell me which informations are given on this selection.
In addition, it seems that you're having problems to access your rabbit's configuration page with your MAC.
Airport on Macintosh is easier to use than a default wifi connection on a PC, and rarely leads to connection problems.
This connection problem may be due to your Airport's configuration.
Could you tell me if Airport is set on DHCP ?
Feel free to ask if you have any question.