Your description of your snake sounds like he is probably stressed. Please make sure your husbandry is up to par. Double check your temps and humidity using a digital thermometer/hygrometer, and make sure your snake has at least 2 snug fitting hides.

You can read more on the caresheet to be sure you've got everything right:
http://www.ball-pythons.net/modules/...warticle&id=59

Also, if you post details about your setup, members here can help you find and correct any issues you may have.