Hi there. I’ve got a problem in my level. In fact, i’'ve 3 differents lights, and they switch on with differents buttons (for example, B switch on the Light 1, V switch the Light 2 and N switch the Light 3). When I press 2 buttons (B and V for example) it work BUT when I press the 3 buttons at the same time only 2 light switch on. I really don’t know where the matter is, if someone could help me I’ll be very thankfull ! 