I'm not a fan of pelleted diets, unless it's a snack during the daytime - as Candy said.
Try researching some of the recognized diets here and see what works for you.
http://www.sugarglider.com/gliderpedia/index.asp?Diet
I do a rotation of instant HPW, HPW complete, ensure diet, and some nights just a balanced diet with fruits veggies and a protein source. This has worked out beautifully. My babies love it and their coats look wonderful! They also they have a clean bill of health from my vet.
Many people have success storied from the other diets. Just find what works for you. Most will agree though that pellets will not give a balanced diet, esp on it's own.