I have tried twice to feed my baby rice cereal and she projectile vomits.What should I try next?

What should I give her to eat other than what I already feed her.I giver her applesauce,sweet pototoes, pears,peas,squash...basically all the level 1 fruits & veggies.I have given her these for about 6 weeks.. Is there anything else I can try for her. She has a bottle every 4 hours(5-6oz) except for the 12 hours she sleeps at night! Thanks!!