One thing I would ask is what bait are you using? IF it is bulky bait or a that has a tendency to slide down the hook on the hook set it could be keeping you from getting a solid hook set. If this is a tube or beaver style bait try placing a tooth pick thru bait into the hook eye to hold it on place. One thing is if your are casting at a distance make sure you are using the proper rod not to wimpy rod and not to stiff a rod. A stiff rod will not allow enough bend to help you keep the line tight when a fish tries to jump on the other hand a wimpy rod will not let you stick the fish solid. Flipping sticks are just that great for flipping and close quarters where you will get the fish in quick and there is not much playing the fish. These are just some thoughts on some things that could be happening that are in messing with your hook set.