yeah, look on the rest of the timer for additional switches. watch the switch as you move it through its paces and then see what it does to your timer in each respective position.
you can also look at your timers and try to find the model number, then search for that information online.
once you set it, you may want to spin the dial, simulating the day going by, and then click past the time on setting with something plugged in and see if it comes on. maybe alternate the positions of the red and green things if you have continued problems.