Kick bass sensor on knees


hello guys

i have some issues with the freedrum sensors, i used sensors on knees for my kick bass drum, heel up or down it dosen’t matter… but recently after the new update i can hear it but the sound is really week so week!! the velocity is the lowest possible, i really need to ta as hard as i can with my feet… but when you play 150 double bass kick its difficult to do that…
Anyway i wanted, to know if you have the same issues here guys
i will provide a video soon to show you whats the problem i am talking about…