m - 2004-06-03

Hi,
      I'm a complete newbie to this app, but I was wondering how I am supposed to print my files. Once I click on print a dialog box comes up with the ability to choose print types and then a box with the "lp" command. I tried using the lpr command and printing a file, but I get a:

lpr: unable to print file: client-error-not-found

However, my printer is already setup and when I use lpr "destination" "file" from the command line, it prints out normal files fine. What am I doing wrong here?