Reset Password

[fabiovin 0]

 I did reset passwor by sadpt tool and It was Successful, but when rebooting, my DVR Hikvision DS-7104HGHI-E1 does not save the settings or the password;
just keeps the date. I replaced the backup battery but it remains the same. I updated the firmware by all means always successfully 
(I have applied these two versions: DS-71_7204HGHI-E1-F1_V3_4_70_160708 and DS-71_7204HGHI-F_ML_STD_V3.4.81_Build170227, 
but when rebooting the device returns to its original state (the firmware version that has had V3.1.8. Build 150714).
Can you help me with this topic? I thank you in advance for the help you can give me.