>Do not force yourself to run on the balls of your feet. I have never
recommended such tension in running.

Focus on the following:
- vertical posture of torso
- bent knees
- hips forward (do not stick the butt out back)
- fast steps (cadence)
- relax, relax, relax..

Listen to what your soles and body tells you. Pain is a tool, to
teach which techniques do not work comfortably. Running is NOT an
endurance sport, where one must endure pain to suceed. One should,
instead learn to avoid pain, in order to run more efficiently,
smoothly, and naturally.

more...

THANK YOU KEN BOB for the weblink and advice.  I am still a bit confused though about how the foot should land when running. 

The website you suggested says the following:

>Any side to side imbalances are amplified when heel striking, because the heel is narrower and less stable.

ALSO:

 >Landing with most of our weight on the forefoot, with it’s greater width, or on the entire sole, naturally promotes a more stable landing. A canoe is easier to tip than an outrigger!

This seems to be saying to land on the balls of our feet.  I will try to bend my knees more and relax.  Thanks again~

Beth