Thank you much for the clarification, now I understand why HDR is not activated, I looked in the exif data and I have speed but missing the aperture data, I am using the Sunex fisheye which has a focal length and aperture of F/5.6 mm (fixed) in fact all the time that I used Autopano have to input the information of 5.6 mm on focal length and appears also the note to send a mail.
Is there a way to input the exif data and focal length manually in preferences or somewhere to be able to use HDR and also not to have to input the data every time I use Autopano? since is the only lens I have to work with.
My suggestion always is to process your bracketed shots into hdr FIRST in Photomatix and stitch in APP afterwards. Photomatix doesnÂ´t need EXIFs - you can tell it which spacing you used manually.
Use Photomatix to process your bracketed shots with tonemapping or tonecompressing, save them as TIFF or jpg and stitch them in APP without problems.
Here you can use colorcorrection easily.