General help

Hi all, I´m migrating some moodle courses from one server to a new one. I can´t see any courses´ images: users images, images within the courses, glosaries, etc. I don´t receive error messages, just blank squares. I changed "slasharguments" parameter but its the same; I configured permissions to moodledata folder and subfolders to 777 and its well set at config.php file; I removed all blank lines from this file too. Now I don´t have any idea on how to solve the problem. Anyway I do see the default smiley and other icons on the site. Thanks for patience and help, Pablo Torrealba