I have a D750 made in Thailand, a Lexar 32 GB class 10 SDHC card, and of course I followed all the steps from here: https://support.nikonusa.com/app/answers/detail/a_id/19320, though, when I press the firmware button in the menu, nothing happens, it just shows that the current firmware is the 1.0 version and that's all. What should I do in order to update the firmware?