I am trying to write the arduino bootloader hex file (ATmegaBOOT_168_atmega328.hex) in a fresh Atmega328 chip. When I load the hex file in the extremeburner software, the hexfile shows only FFFF. The hexcode is full of FFFF codes, no other hex number is there. Is it ok or is there any issues in the hex file...? Kindly explain the issue.