version 5, R3, Atheros wifi obtain ip address

I have just installed BT5, R3 on Acer laptop. with Atheros card. I can see the following details
# lshw -C network
*-network
description: Wireless interface
product: AR9485 Wireless Network Adapter
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 01
serial: 44:6d:57:a1:fc:6f
width: 64 bits
clock: 33MHz
In WICD, i can see wifi, but when i try to connect, it stops at obtaining ip, and then gives error of the same.

How to solve this???

If vm install, internal wifis won't work...IF hd install, are you using WEP or WPA-WPA2?...Is driver loaded by kernel athk9?