I had the same error using bt5 on vmware with a usb dongle. I simply killed the specified processes and was able to proceed.

I was getting this error as well.

To connect to wireless using WPA/WPA2 in Backtrack 4:

1. Create a file /etc/wpa_supplicant.conf, copy and paste in the following

network={...

/pentest/passwords/wordlists

Instead of dhcpcd <interface>, try dhclient <interface>.

I had that error with my wusb54gc dongle -I pulled it out and plugged it back in and it worked. Seems to work better if you plug it in after bt3 has loaded.

I got the "Radio of your wireless card seems to be turned off" error message using my wusb54gc dongle. I removed and reinserted the nic and it worked. Hope this helps.

Also, the dhclient...

I would also be curious to know if packet injection and other wireless analysis tools work using the native network card(s), macbook/pro with vmware fusion and BT3, or must this version use USB as...