Do you have the power on reset circuit (D4, C6, and R9) built? If not, put that in and see if that solves the problem. And don't forget the pull down resistor, R2.i actually have the 555 and 4017 connected in a breadboard using a 9v battery just for testing purposes at the moment. whenever i connect that output 2 to clock disable output 0 just remains on and is stuck right there no other leds light up. i actually have alot of 3904s in hand