When using Metasploit's SYN or ACK portscanners (auxiliary/scanner/portscan/syn or ack) with my ALFA AWUS036H the scan just hangs; doesn't do anything. When using my laptop's built in wifi adapter (Intel Corporation Centrino Advanced-N + WiMAX 6250 (rev 57)) these scans work just fine. If I use the auxiliary/scanner/portscan/tcp with my ALFA it works. If I use Nmap with the options -PS or -sS that uses SYN packets then it works just fine. I'm just wondering if anybody has a clue why the ALFA won't use Metasploit's SYN or ACK portscanners. Thank you.