adam234912, what other miners are you running from your computer? Are you using CGMiner as a stand alone or selected in Easy Miner?
I've literally just gotten it working!
Apparently the WinUSB drivers that I installed using Zadig were not playing well.
I uninstalled the WinUSB drivers and installed the standard serial driver (Silicon Labs CP210x USB to UART Bridge), tried BFGMiner instead of CGMiner, and all of a sudden I'm picking up the pool and hashing happily.
Many thanks for your interest and for trying to help!