Those are good suggestions you have received so far, and both or either should help you. You didn't tell us how large the property is, or whether you have exclusive rights to it. How long did you wait between calling attempts? Sometimes less is better, and it sounds like you've used too many sounds on those two occasions you mentioned. Guessing that you are probably a relatively new hunter without much property to call yet, and that certainly makes it hard to not call the property too often. Ideally, calling it once or twice a year would be perfect, but you may not have that luxury yet. Finally, there is no substitute for how your stand is setup and having the wind right. Wait for a wind that will make it very difficult for them to get into your downwind without having to expose themselves.