Im kind of a newbie to backtrack and linux but I was following one of those easy tutorial things, and when I got to
aireplay-ng -3 -b (bssid) -h 00:11:22:33:44:55 (interface)
I get
Read * packets (got 0 ARP requests and 0 ACKs), sent 0 packets
Plus the #Data never goes up.

I know the alfa *036h works with backtrack right of the bat, it does support injection because i've done the test. And I have looked through this fourm, and seen people with this problem but ive never seen a clear solution, so if anyone would be kind enough, I would appreciate it very much.