That is a Chinese Region camera you're running Haemse and unless you apply some fixes which have been posted here on ipcamtalk.com you're going to end up with either a Chinese language camera or with a bricked camera. The 5.3 firmware release is not recommended. There is a 5.25 firmware version which is recommended, but you need to read those threads BEFORE you proceed and further. What is wrong with your 5.1 firmware version? Why to you think you need to upgrade to 5.3 Haemse?