BossMoss, I agree with Bob on the gettin' busted idea pretty much. The other thing is someone(or lots of them) else may be educating them as well. Late season is usually the hardest time to fool them. In an area where callin' is just catching on there will be a lot more novices out making mistakes, this just makes them more cautious. Going to something other than a rabbit call helps to.
You might want to try just using a sqeaker first, then call.
Bobs' idea of paying a lot of attention on approach is very important. One of my favorite spots that we called fairly often allowed us to walk up a hill and break over the edge of some rimrock. It worked in our favor a lot. Being concealled, wind direction, and noise are important things to keep in mind.
BigNate

I was out in the cold -5 this morning looking for some yotes and all of a sudden I here barks and howles. I set up my decoy and start calling with a ribbit in destress call nothing call again nothing. The area is covered with tracks. Did I do something wrong or was it just not my day. Should I go back and try it again. I have never shot a yote but have been trying a little the last couple of years. I have never seen one while hunting did one after calling have them start barking and yepping at me.Yote hunting is just starting to take off around here as we are just getting enough to have a good chance.

If they are barking at you, chances are your were busted on your way in. You need to sneak into the area you are going to call as quietly and invisibly as you can. Leave your truck down the road well hidden from sight. When you get out don't make a lot of noise or close the door hard. Walk in as quietly as you can before first light and set up either facing in to the wind or cross wind. Don't walk over any ridglines where you will be silhouetted or across any large open areas if possible. Start calling as soon as you have enough light to shoot. Without knowing the area you are hunting.....these would be the things I would look at first. I am sure the gang will chime in with some more ideas.

Good Hunting,

Bob