kingcctv

Hi, I have got Hikvision dvr: ds-7816HE-E1/M. I have successfully managed to change the iLanguage flag to 1, hence english. But i have tried multiple ways to upgrade the firmware to the DVR, it simply fails. But I was able to successfully upgrade using the old chinese version: V3.1.4 build 150430 Could assist in making the modified firmware upgradeable and recognised by the DVR. The DVR replies with an error: Upgrade failed. Thanks