Dear Sir,
Have you installed the latest BSP on your Windows 7? We have recently changed the ETHAPI internals to support Windows 8.1. We don't use our proprietary NDIS driver anymore but we rely on WinPCAP.
Can you tell me if you are using "Installer Version 2.235.1 27 June 2014.", this is the moment we changed ETHAPI. If you do use this installer, can you confirm you have installed WinPCAP on your machine?
Thanks,
Arnaud