please help me, i'm indonesian, i beginner in backtrack.
i have install backtrack on my pc with backtrack R1. but when i make my networkcard to enable monitoring, it me jammed.
this my code
airmon-ng start wlan0
then my pc direct jammed, i can't to working again. i must push the power bottom to shutdown my pc and i must turn it on again.

my network card is broadcom with 4313 driver and it is works well to connect to internet, just when i enabling this card to monitoring mode like that, my pc direct jammed.

please help me to fix this problem.

sorry if my english is bad.