I have an Alfa 500Mw AWUS036H usb and followed a guide on the Aircrack site and patched my drivers but when I run an injection test (aireplay-ng -9 wlan1) and get the following:

13:23:06 Trying broadcast probe requests...
13:23:08 No Answer...
13:23:08 Found 1 AP

13:23:08 Trying directed probe requests...
13:23:08 <ADR:ES:SS> - channel: 10 - 'BTVOYAGER2091-6C'
13:23:14 0/30: 0%