I did export my design to a .html doc and a .hyperesource file and uploaded it to my test server.
Soon, I did notice that some elements (logo and other image) did not appear in the website.
After checking, I found that these two files had "tilde" or some special characters with punctuations, for example: triángulo.jpg, logo_nación.png... ó, á, í...
As soon as I did erase these special characters, replaced the files, exported and uploaded, the problem was solved.
Hope this tip helps someone.