Do you have the trolling bibles and are you working the right depths? You didn't mention anything about depth in your post. Two things to check. Check that your line counters on your trolling reels are accurate. that could cause you to be fishing at the wrong depth. Also make sure that you have the correct charts for your dipsey's. I always have one side of the boat slightly above the depth I am marking fish and the other side above that depth by 4'. Whichever catches fish I adjust to up or down. I stop catching fish and I try adjusting the depth again. Fish move and adjust, you have to as well.