Warning: file_exists() [function.file-exists]: open_basedir restriction in effect. File(/usr/home/paitoon/domains/paitoon-srifa.com/public_html/moodle/lib/setup.php) is not within the allowed path(s): (/home/paitoon/:/tmp:/usr/local/lib/php/) in /home/paitoon/domains/paitoon-srifa.com/public_html/moodle/config.php on line 276

Error detected in config.php

Error in: $CFG->dirroot = '/usr/home/paitoon/domains/paitoon-srifa.com/public_html/moodle';

Try this: $CFG->dirroot = '/home/paitoon/domains/paitoon-srifa.com/public_html/moodle';