Help installing PHPbb

Can you please tell me how to fix these phpbb installation errors?


Warning: include(./../db/mysql4.php) [function.include]: failed to open stream: Permission denied in /home/tgcn/public_html/save/forum/includes/db.php on line 35

Warning: include() [function.include]: Failed opening './../db/mysql4.php' for inclusion (include_path='.:/usr/local/lib/php') in /home/tgcn/public_html/save/forum/includes/db.php on line 35

Fatal error: Class 'sql_db' not found in /home/tgcn/public_html/save/forum/includes/db.php on line 60

Did you upload everything? Did you set the correct file permissions on everything? Did you actually read the "read me" before trying to install? Also what version of phpbb is this and where did you get the download from?