My hanging baskets are lush and full but no flowers.
New Guinea Impatiens
Certified GKH Gardening Expert
This article will refresh you on the care requirements.
New Guinea Impatiens need evenly moist soil, and are heavy feeders.
Make sure you use a low nitrogen fertilizer; too much nitrogen will inhibit flowers leaving you a lush green plant.
If you have over fertilized, try adding a feeding of phosphorous rich Bone Meal.
Here are some links to help you.