I DID IT!
The problem was that my home page (www.example.com) was default.php and .htaccess said:
DirectoryIndex default.php
That generated error on blog/ subdirectory (WP instalation).
I renamed default.php to index.php in my home site, changed htaccess and it was solved.
Thanks for answering.
What i figured out its that the real problem is with WP home in my subdirectory.
wwww.example.com/blog/
Displays 403 Forbidden.
On the other hand,categories, labels, posts & search works ok.
I’ll keep looking foward in previous topics.
