Step by step installing new firmware
Download FW > Expand > Go inside Expanded folder > Drag all from inside to SD card > go to FW Update menu at camera and update > wait until camera go OFF.
Turn OFF than ON camera and check at FW menu what version.
Correct time and date.
Including, maybe, STYLE of date (day,month,year). and perhaps ZONE.. (where you are in the World) .. check ALL the Menu...some few things can get changed... if it's like happens when you use the Hidden Menus etc