[HELP] Backtrack 5

I am trying to use Backtrack..pero hindi po nadedetect ng program ung wireless adapter ku..nakaenable naman..

I am using a laptop with built-in wireless adapter..everything is enabled..sabi pa "no nterface detected"

Kelangan ko pa bang bumili ng USB wireless adater?

Please help me out mga master..

thanks..!

http://imagizer.imageshäçk.us/v2/xq90/833/g2f3.jpg