I recently bought to programmers 595-MSP-FET from Mouser as extra's for our Test group but I have initialization error when trying to communicate with new units. The older units work fine when I swap one in and both programmers look identical by the eye and with the Device Manager. The lights are correct so what could be different? Could it be a firmware issue? Is there software I can use from TI to distinguish the difference between the 2 different MSP430 units?