LOADING A FILE

I’M NOT SURE WHAT I HAVE DONE,WHEN I TRY TO IMPORT TO SHEETCAM THE RED SCREEN DISAPPEARS AND I GET A BLACK ONE WITH NO PICTURE. THIS HAPPENS WHETHER I DRAW ONE OR INPORT ONE, NO LAYERS SHOW UP AND THE SCALE IS 1:25.4 IS THIS EVEN RIGHT REAL NEW AT THIS AND THANKS FOR ANY HELP