If the driver of the sentinel key has been installed while the key was already plugged in the computer/NC, it won't be detected.

    - Uninstall the Modeva software. (Quit the Modeva software / start menu / DNC1200 / uninstall)

    - Uninstall the sentinel driver. (Under Windows in programs setting, uninstall the "Sentinel protection installer" as any other standard application)

    - Reinstall the Modeva software (the sentinel driver will also be installed in the process)

- The driver could be corrupted, follow procedure in step 1.

- It could be a hardware issue related to the CPU/computer, try using another usb port.

- Your dongle might be defective, you can try to use it on another computer to make sure.