I am having issues with one of my machines, I am using 3/4 board that is 18 inches long, when it comes to loading the cutting bit it keeps telling me that the board is to thick. I have tried all of my cutting bits , even new ones and get the same message. I even replaced the board tracker and still the same message. HELP running out of ideas. oh even reformatted card and tried card in another machine and it worked .