Saving flights and Panel states

First off great addon!! Ok was doing the tutorial, and had to save the flight a couple times. Loading it up today and i get a 737ngx.dll CTD. However the earlier save works fine. Is this due to me not saving the panel state the second save? Also many times after saving i get a black screen with the NGX, and the other thing i noticed is that when loading the plane doesn't seem to initialize every time when loaded. Is that normal? When starting a new flight everything works fine.