I have a Janome DC3050, the machine keeps going on its own. I have to turn it off to stop it, then sometimes it starts without my touching it. The first time it did it I almost jumped out of my skin. Has anybody else had this problem with the Janome foot pedal? I went on line and they run from $70 to $90 dollars for the exact same pedal but I don't want to buy another one that might be haunted. Any suggestions?