The "Exclusive" feature requires proximity. If the client is too far from your adapter (-70 dBm signal or worse), WinPcap cannot distinguish the handshake from background noise. Use a high-gain antenna.
In the niche world of wireless network auditing and security testing, certain toolkits achieve a sort of legendary status among enthusiasts. One such combination is the trio of , Jumpstart , and WinPcap . dumpper 912 jumpstart winpcap exclusive