recently re installed my veritas 8c alarm system. After reconnecting all the wires back up i followed the commissioning section in manual. attached battery all lights lit up then went out apart from zone 4. After checking and rechecking wiring even changed battery still zone 4 lights and beeps. So now i have disconnect all the wires associated with zone 4, retried and guess what zone 4 light lit and beeps.. please help.