Import new freesurfer volume atlas in subject space for SEEG electrode localization

In addition, I want to use the thalamus atlas in the default anatomy, so I export the defalt ICBM mri image and used it for Freesurfer rencon-all parcellation and got the atlas. But when I imported the new thalamic volume atlas (subject space), the atlas cannot be overlayed on the default MRI. The error was as below.
1
when I imported the volume atlas (MNI space), the atlas could be overlayed but it seems the atlas was not well aligned to the MRI.
3

The file contents of the atlas are as below:

So how can I use the new Freesurfer atlas in the default anatomy?

Thank you very much!
Fang