Guitar Hero 3 (PC)

I downloaded, installed and run the game. Everything is fine but when a song starts and i press the keys it doesnt do anything lol. Help would be appreciated.
Answer #1
try tweeking the delay settings/the keyboard configuration
Answer #2
left mouse button needs to be pressed when you press the key for the color
Answer #3
no you need to press up button when pressing the right color imagine that you are pressing the wire on guitar you need to press down and up and delay in long colors