There is a known conflict between WinPcap, the driver used in WireShark and many similar products, and the driver used in CommView. There is a simple workaround: Start capturing packets with WireShark before you start capturing packets with CommView. In this case, both products will be able to capture data simultaneously. If you start capturing with CommView first, WinPcap will fail to capture any packets for a reason unknown to us.
