keyboard midi problem

my midi connected keyboard triggers if i am playing on it (channel 1) the internal mpc drum sound which i only want to trigger with the pad. also loading a new programm in the synthi will result in a programm switch in the mpc. how can i suppress this ?

you are switching the program from drum to midi in the main sequence screen right?

you are switching the program from drum to midi in the main sequence screen right?

yes it is switched, but i am not sure that i switched it. i will test it this weekend. thank you