1.) First thing you have to do is install wow 5.00.3, genuine install which you can find in post #1. 2.) Then install autocom/delphi if you want (or you can do this before wow, doesn't matter). 3.) Find and download firmware 1423 for wow from links in post #1 4.) Copy all firmware files to installs ac_diagnosis_module firmware and also to Delphi&or Autocom installs folders Firmware 5.) Open wow 5.00.3 and update firmware from it.