Sitting in front of my computer so here are the steps to change the paper size. Initially you should change the page size in Corel. Then go to file, print. In that box select the accurip to the name of your printer. Then click to the right on properties, on the paper tab click on advanced. This will open your advances options and for paper size select the since you had selected at the very start. Then click ok, ok, and then click on print preview. This will show the page you plan to print and hopefully everything will look correct. Go to file and print this sheet now. That way accurip only prints one page for you.
Hope that helps.