Sprinkler System Unresponsive?

I'm barely using my sprinkler system for the first time after purchasing my home. When I turn the water valve on for the system all the zones run at the same time. I've tried messing with timer/controller and nothing I do has ANY effect on the sprinkler system. I try going to manual and select only one zone but all zones continue to run. I've checked the connection of all the wiring at all the valves and re-spliced them (there was a bit of corrosion on some) Any ideas what this could be? Why is my system unresponsive to the controller? :(