PaulS:
The problem is that the LEDs don't seem to turn on when they are supposed to.
Do they turn on some constant period of time late? Or, do they simply never come on?
Have you verified that the LEDs are wired correctly?
They don't appear to turn on. If they are turning on, it may be for a period so short, that I can't see it with my eye.
The LEDs are wired correctly. I can up load a "traffic" light sketch which with the same wiring and pin outputs will light them on and off.