Transitioning him to a new healthier diet will take time so don't panic if he is not eating the veggies right now but keep offering them for usually they will take a notion to try them and enjoy some so don't despair, besides like Jay and Dave said if you are offering too much fruit no wonder he doesn't want the veggies, they are just like small children right not, they want the sweet and not the good for you stuff. Try all kinds of veggies, be sure to check the list in the bird food room of forbidden foods but try them different ways, cooked, fresh raw, chopped, mashed and whatever way you can think of for some prefer them a certain way or will more readily eat them one way more so than the other, but the main thing is to keep trying.