be patient. Try moving your embouchure hole around. Practice in front of a mirror and look at the shape of your lips. Your embouchure should be about the size of a drinking straw and shaped like a circle or teardrop.

Here's a neat way to work on producing sound:

1. Press your lips together. Roll the lips inward, so that there is no pink showing.
2. Kiss your flute--place the embouchure hole completely against your pressed lips, so that you can feel the full circle around your mouth.
3. Roll the flute away from your lips approximately 90 degrees, so that the embouchure hole is now level with the ceiling.
4. Pretend to spit out a watermelon seed!(Try not to spit into the bottle or flute if you are using it) This may assist you in finding a good embouchure shape. If you achieve a sound using this method, try adding a stream of air after your initial "spit".