I couldn't use one of those for YEARS until I finally just kept playing with it until I got SOME sound out of it and then I started putting 2 and 2 together and before long I was making all kinds of racket with it! Sometimes, I even sound like a turkey! haha
Scott's got it right though, just relax, and if it's making you gag alot, you can carefully trim the call. Just take a little at a time.
"Knowing when to shoot and when to wait is one sign of maturity in a bowhunter. Be patient and pick your aim point carefully." ~ Randy Ulmer
"I suppose it's the way of hunters. We are very odd fellows." ~ Peter Hathaway Capstick