I have a 5 gal., 125# compressor, and I bought a tire chuck for it. Air comes out of the chuck OK, but when I put the chuck up against the valve, once I get the chuck seated it makes no sound of flowing air, and the pressure in the tire doesn't go up. I have used this kind of chuck thousands of times; it's the kind that used to be on the end of those tire fillers at gas stations. I cannot imagine what I am doing wrong. I have used the air machine at the gas station a few times, successfully, but this just won't do.