I cannot get the CNC to download or upload a program to PC/NC. The error message is "Can't receive start of a file". On the machine parameters the AGG sheet shows for example #002 is this considered the #0020 parameter. Usually I remember seeing a % at the beginning and end of programs in other CNC but this controller does not show a % at beginning but at end. Could this be why it does not rceive. Also the bits are considered from left to right starting with 0 correct?