OK thank you so much! I removed the wires from those pins and shifted them.
I connect the USB cable from Arduino to my PC but I cannot find the COM1 port there (not in Arduino MEga and not in Control Panel: Ports)!!
This is my setup (pictures attached - sorry for too many wirings and confusing background in advance).
This is the code I have used (very basic):
#define STEPS 200
Stepper stepper1(STEPS, 0, 1, 2, 3);
Stepper stepper2(STEPS, 4, 5, 6, 7);
Stepper stepper3(STEPS, 8, 9, 10, 11);
I would appreciate your help. Am I connecting to wrong pins to Arduino? Am I drawing too much current?? As you can see both the "ON" green and "L" yellow LEDs are lighting!! why is that?