I followed the Fsfasttutorial to learn fsfast. But when I run tkregister-sess -s mgh-101.1 -regheader, I always get such error message

tkregister-sess logfile is /san1/acat/free/fun/fsfast-tutorial/fb1-preproc-study/log/tkregister- sess.log --------------------------------------------------------------

Session: /san1/acat/free/fun/fsfast-tutorial/fb1-preproc-study/mgh-101.1---------------- Thu Aug 9 15:19:10 MST 2007 ERROR: fbph1-101 is not in SUBJECTS_DIR SUBJECTS_DIR is /san1/acat/free/fun/fsfast-tutorial/fb1-preproc-study

thanks