I have all folders with 755 permissions and all files re-uploaded with 644.
It doesn't works.
I'm anyway in contact with my hosting, they right now checking at this problem, i supose i will get an answer today.
Is the first time i have this kind of problem with a backup uploaded in a different server, i guess i'm getting this problem because there is something which is given the old path to the images, but i cannot find what or why.
Thanks for taking part in my issue.