lhfaevolution

Hello, i have a problem with my dahua DVR. I bought it in China and tried to flash it with a english firmware. What i found in the Internet and here was a General_DVRxx04HF-X_Eng_N_V2.616.0000.0.R.20130305 Firmware. Everything seemed work correctly but i realised that i had no more language. The onlyst i could see was that the buttons were marked with codes like config.languageset or similar. the second thing was that the playback function does not work anymore. I think this happens because the nvr has no language to display the month and find the correct file. the third thing is that nvrclient is not working, it works for 10 minutes and displays then "no valid license file for this device found" please help me