I have an old Dell latitude laptop that i use to connect to the internet using a DLink model DWA-645 PCMCI card, it works OK in XP. In BT4, when i go to the console i can see that the leds of the wireless card are turned on but:

- when i execute comment iwconfig it tells me: wlan0 IEEE 802.11bgn ESSID: "", Access point not associated. Can not see any mac address.

- when i execute command airmon-ng start wlan0, it tell me wlan0 Atheros ath9 - [phy3] (monitor mode enabled on mon0), BUT the leds on the card turn off.

- when i execute command airodump-ng it tells me input/output error.

Please help me on making this work.