sampler on rekordbox while using my flx10

When I use rekordbox and have a song loaded on deck a and nothing on B when i push a pad for the sampleron my flx10 it loads on the empty deck.  it is weird because i have rekorbox on another laptop and when i push a pad for the sampler and have 1 or both decks playing the sampler still plays like it should. Any ideas on how to fix this? should i reinstall rekordbox? should i put rekordbox to an earlier version? Thanks for any help