Why doesen´t work my W-Lan Card "Intel(R) Pro/Wireless 2200 BG" on a Acer Notebook with the BackTrack 2 Final Live CD?

I can connect to a unsecure W-Lan but the Status-Led doesent work.

When I type "iwconfig" come "No Wireless....."

and airodump-ng doesent work.

Please help me

Sorry for my bad english.