hi every one!i have a big problem!
when i write iwconfig wlan in term he says "wlan0 no such device"
i have an hp 620 with wireless card Realteck (RLT8191SEvA Wireless LAN controller)
how can i install the driver of these wireless card?
if i install a new kernel?
there is a wireless usb card compatibile with backtrack 5?

please help!

P.S. sorry for my bad english!i' m italian...