I purchased an ALFA AWUS036H card, installed backtrack 5 on my laptop (installed to the whole disk) and plugged it in. It recognizes it right away, as I am told it should. So I try and test it out on my network.. I enable it in monitor mode. start airodump. then after a few seconds it stops and says mon0 is not a valid interface. when i type iwconfig it shows wlan1 still, but txpower=0 instead of 20. Is there something wrong with my installation? it does this on both my laptop and my desktop..

note: the card power cycles in windows, but i've heard that is common with the 1000mw 036H. I've also exchanged the card for a new one twice thinking the card was defective.