Problem when changing midi track sounds preset to other

Hello,

I have problems with my Logic Pro X.

Here is the example: I create chord pattern with guitar pro. I export it to midi file and then import it to Logic. Okay now I choose sound for the midi track from logic’s libary and I choose Chamber choir. Everything works and track is now Chamber choir. When I want to change choir settings from control window my problem is at hand. I can change tone, attack time and so on, but there are these four different choir styles ”Aa, Uu, Oo and Mm.” When I click, lets say ”Oo” but for some reason it only plays as preset: the first ”Aa”. Logic won’t let me change it. Same goes with many other sounds as well. With studio violin if I want violin play pizzicato it only plays as preset sound which is in this case staccato.

I would really appreciate if somene got solution for my problem