Ive connected 5 scanners together. When I power them up, only one unit works. Ive triple checked my wiring, and cant find any mistakes. if I swap the processor from the one unit that is working to one of the non-working units, that unit will then work. Normally, I would assume that I have 4 defective processors, but that seems kinda bizzare. I purchased The 5 preprogrammed processors from EMSL, it seems highly unlikely to me that 4 out of the 5 processors I recieved are defective. Any ideas????