I installed BT4 on my laptop. When i run wicd, all the networks which are visible are encrypted. To connect to them i get a message 'encryption should be enabled before connecting to the network'

Ok so I go in the advanced settings and there I am asked to enter the WPA key.

Now my question is this.
The network is public. Secured but public and I can connect to it using windows without any password or WPA key authentication. Windows connects to this network using TKIP encryption.

How do I go about this? I am not asking how to hack WPA but how do I connect to the network since I do not know the WPA and it is not requested while running windows.

Is there any other way to connect without entering the WPA ? If so how ?

Thank you for the time and help!