You need to include a registration file with your tksurfer command, 
something like:
tksurfer subjectid rh inflated -reg featdir/reg/freesurfer/register.dat 
-overlay featdir/rendered_thresh_zstat1.nii.gz

Did you check the registration with tkregister2? If not, do so first.
You can also load it on the volume witth:

tkmedit subjectid orig -reg featdir/reg/freesurfer/register.dat -overlay 
featdir/rendered_thresh_zstat1.nii.gz

doug



leonardo kay wrote:
> Thanks Doug.
>
> After doing reg-feat2anat , I checked the registration and overlaid 
> zstat file:
>
> tksurfer subjectid rh inflated -overlay 
> featdir/rendered_thresh_zstat1.nii.gz
>
> I have attached an image of tksurfer interface . I'm not quite sure 
> about what blue and red clusters mean. They are suposed to be 
> activations, but I'm not watching the same in FSL-view. Could you give 
> me a hand please? Am I using the right stat file?
>
> Thanks in advance
> best regards.
>
>
>
> ---------- Forwarded message ----------
> From: *Douglas N Greve* <gr...@nmr.mgh.harvard.edu 
> <mailto:gr...@nmr.mgh.harvard.edu>>
> Date: 2011/3/23
> Subject: Re: [Freesurfer] [Fressurfer] fMRI and anatomical T1
> To: leonardo kay <leonardo....@gmail.com <mailto:leonardo....@gmail.com>>
> Cc: freesurfer@nmr.mgh.harvard.edu <mailto:freesurfer@nmr.mgh.harvard.edu>
>
>
> There is a tutorial on this on our wiki. Basically, you need to run 
> reg-feat2anat to get a registration file, then run tksurfer passing it 
> the registration file and the stat volume as the overlay.
>
>
> doug
>
> leonardo kay wrote:
>
>     Hi all
>
>     Can anyone help me overlaying fMRI activations from fsl on a
>     anatomical T1 volume in freesurfer.
>     Is there any previous format conversion to do before?
>
>     Thanks in advance
>     best regards,
>
>     -- 
>     Leo Kay.
>
>     ------------------------------------------------------------------------
>
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>
> -- 
> Douglas N. Greve, Ph.D.
> MGH-NMR Center
> gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu>
> Phone Number: 617-724-2358 Fax: 617-726-7422
>
> Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting 
> <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting>
> FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html 
> <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html>
>
>
>
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>
> -- 
> Leo Kay.
>
>
> ------------------------------------------------------------------------
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-- 
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358 
Fax: 617-726-7422

Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html

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