I am in the process of starting to wean, so the...

I am in the process of starting to wean, so the nurse suggested s26 gold alpha pro. She had 170mls last night no trouble but has done nothing but projectile vomit all arvo since i gave it to her. I gave her dinner a while after the bottle and she kept dinner down but still vomited formula up.Is this formula too strong for her? Did anyone else have the same problem?