I have problem but I don't know where

[kenben]

The thing is, we use the bootloader for convenience so we don't have to use a programmer to update the firmware all the time. If you use the hex firmware from that archive (megadrum_20100516.zip) then you will always need to use a programmer to update the firmware. With syx though you can update via USB-MIDI or MIDI I/O.

hmmm....i see what you mean now....the problem i am having is that i am unable to press LEFT key and change the clock once i successfully upload the bootloader. I checked the keyboard connector and it seems to be fine so i m pretty much stuck in this.

[mackanov]

If you can, try shorting the ground and the pin for the left button on the board instead of pressing the button, just to make sure you don't have a faulty button.

[kenben]

If you can, try shorting the ground and the pin for the left button on the board instead of pressing the button, just to make sure you don't have a faulty button.

yea..i tried it ...still no good...i m thinking something wrong with atmega...or circuit it self