проверил
Warning: mysql_connect() [function.mysql-connect]: Access denied for user 'u...'@'localhost' (using password: YES) in /home/u.../public_html/str2.html on line 39
Warning: mysql_select_db() [function.mysql-select-db]: Access denied for user 'root'@'localhost' (using password: NO) in /home/u.../public_html/str2.html on line 40
Warning: mysql_select_db() [function.mysql-select-db]: A link to the server could not be established in /home/u.../public_html/str2.html on line 40
Warning: mysql_query() [function.mysql-query]: Access denied for user 'root'@'localhost' (using password: NO) in /home/u.../public_html/str2.html on line 42
Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /home/u.../public_html/str2.html on line 42
Warning: mysql_close(): supplied argument is not a valid MySQL-Link resource in /home/u.../public_html/str2.html on line 43
Warning: Cannot modify header information - headers already sent by (output started at /home/u.../public_html/str2.html:11) in /home/u.../public_html/str2.html on line 46
У тебя там даже соединение с БД не работает, ну и header() естественно, то же. Поправь в файле логмн пароль к бд, на хостинге он ведь точно не root