ATmega 2560 bootloader doesn´t work

Hi. I bought Arduino ATmega 2560 but come without bootloader. So I try use flip to fix it. After that my PC recognized boar as ATmega 2560 so I thik it is OK. But when I try upload code it only reset board and TX one´s blink and that´s all. If somebody has that problem please tell me how to fix it.