I think i finally solve this problem. In the Import Dialog, Ignore smooting Groups must be marked.
That has me busy for a while and I do now know why it hasnt work Constantly for me .
http://3d-coat.com/forum/index.php?showtopic=16502&p=111892 Small checkbox, but great impact
Thank you carlosan, when I saw that it works for you, I was motivated to try systematic everything again.
Edit
I wanted it mark as solved and not give me a best answer tag
