DURABRANS DVD HOME THEATER SYSTEM sts 96. SPEAKER TERMINAL 20 (RR), 15 SUBWOOFER, 21 CENTER

Question

SPEAKER TERMINAL 20 (RR), 15 SUBWOOFER, 21 CENTER SPEAKER, AND NUMBER 16 (LR). THE ONLY TERMINALS THAT ARE WORKING IS NUMBERS 14 (RF) AND 22 (LF). THE SPEAKERS WORK IN THE WORKING TERMINALS BUT NOT WERE THE SHOULD BE WORKING. ARE WE HOOKING THEM UP RIGHT? WE HAVE TRYED ALL THE DIFFERANTS WAY TO HOOK IT UP NAD THOSE ONES ARE NOT WORKING...PLEASE HELP!!