Sampler banks no working pioneer ddj sx2

Hi. I got  pioneer ddj sx2  but I have a problem with the banks samplers  I charge de samplers I the banks A, B,C, D when I press the button sampler all of them are in blue light exept the last two in each desk  I knew those pads is to activate the banks A. , B, C,D ,  but when I press those buttons not working only works when I press with the mouse in the serato dj.