Printing Payroll Cheques

 I go0t a new computer and reinstalled Simply pro 2011 on it and it works fine except that I cant print payroll cheques. It keeps saying that I done have a file name. I selected: Form Type--Custom Simply Form, them Payroll check with YTD totals, then browsed to C;\program files\sage simply accounting pro 2011\forms\payrlchk06.sfm. I used to know how to solve this but I forgot and would appreciate any help.