You must not send a Maple worksheet file (name ending with .ms) to the printer! Instead, select the Print command from the File menu. This will pop up a Page Setup Dialog. Just as for a plot, you can save your worksheet to a PostScript file for later printing, but it is probably more convenient to send it directly to the printer. To do so simply click on the click the OK button and your worksheet will be sent to the default printer which is in Wilson 2-243.