i have a Blackheart BH15-112 http://www!.blackhearteng!.com/bh15112!.htm!.!.!. amp and a Dean Evo http://www!.deanguitars!.com/bnds_v1/evo_t!.!.!. when i flick the switch on the guitar to the first pickups the amp makes a crackle when i flip the switch to last pickups the amp crackles, when i flip the switch to both pick ups it sounds fine!? is there something wrong with the guitar, pickups, amp or all of themWww@QuestionHome@Com