Visit sometimes MX4000-T128 website we recommend. It will help you to use your K9AGM3-FIH hardware to the fullest MSI extent.
There, you can download the latest K9AGM3-FIH updates of firm ware and MX4000-T128 drivers for your T656dne device. You can also create PRO50N-AP123C restore points of your system in case of program failure. You would be able to retrieve initial state easily and try installing a K9AGM3-FIH driver one more time. If you have an outdated T656dne unit, you won’t be able to find the matching K9AGM3-FIH driver thereto.