Velocity value problem in cubase11 and nuendo11

in the moment I’ve problems with velocity values in both cubae 11 and nuendo11 with halion 6,5 and vienna instruments e.g. synchron strings pro. even velocity values of 20 and 100 lead to the same result, means, there is simply no velocity and sound control: the result is simply awful

any idea, tried already different things and keep on track

best, Udo