Problem with in navigator with JPEG 2000

[p.tarot at aveniortho.fr]

Hi team,
I have recently installed Digikam 5.5. 0 on my Mac and I am in trouble.
All the photos in JPEG 2000 format ( .jpf ) doesn't appear in the 
navigator while all the photos in .jpg or .jpeg are looking very well .
I tried to convert some of the invisible photos  (in .jpf) in jpeg 
format. After conversion they are perfectly visible in the navigator.
Thank you for your help.
Chears.
Philippe
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