Also a question of mine, in general, my COM4 is set to 9600 baud but in the "boards.txt" the uno.upload.speed=115200. Is that a right? I tried to lower this to 19200 but no change.
The baud rate a specific bootloader uses is 'hard coded' into the bootloader code, it is not changeable, so the IDE looks at the boards.txt file and uses the baud rate value from the selected board entry in that file for the board selection choice you had set in the IDE.
Lefty