Imagine that after a visit to the doctor's office you are given a prescription by your doctor to deal with a relatively minor -- but still serious -- medical issue. With the right medicine, the proper dosage and your persistence in taking the medicine at the right time, your condition should significantly improve, or be cured all together, in a short time. So you go to the pharmacy to get your prescription and then in the next week, you stay on top of your medication schedule.
After seven days though, you don't feel any better. In fact, the medication doesn't make you feel well at all. So you go back to your doctor and show him or her your medication bottle. Your doctor looks horrified. "It's the wrong medication" your doctor informs you, as your head slumps into your hands.