I have a H.264 Network DVR. Product No: ST-HVR8616
System is V4.02.R11.24340062.10001.0300-LSX
Create Date: 09-06-2014 10:48:39
Serial Number: e101a769543ea05f
just admin username is installed on it and we don't know password on it. How can I reset admn password on it?