hi, when I run the recon-all -s wangrong -qcache command, It goes wrong, show like that:

-------- freesurfer-Linux-centos4_x86_64-stable-pub-v3.0.5 --------
Setting up environment for FreeSurfer/FS-FAST (and FSL)
FREESURFER_HOME /usr/local/freesurfer
FSFAST_HOME     /usr/local/freesurfer/fsfast
SUBJECTS_DIR    /usr/local/freesurfer/subjects
MNI_DIR         /usr/local/freesurfer/mni
GSL_DIR         /usr/local/freesurfer/lib/gsl
FSL_DIR         /usr/local/freesurfer/fsl
wangjian@linux-sner:~> recon-all -s wangrong -qcache
ERROR: Flag -qcache unrecognized.
-s wangrong -qcache
wangjian@linux-sner:~> qdec &
[1] 13325
bash: qdec: command not found
[1]+  Exit 127  & nbsp;             qdec
wangjian@linux-sner:~>

Do I need to install some plug-in software to do Qdec? or what's wrong with my procedure? Thank you!