phpbb2 plus 1.53a errore

quando vado ad effettuare l'installazione mi dà il seguente errore:

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Si è verificato un errore durante l'aggiornamento del database

Could not insert statistics_mod_startdate :: INSERT INTO phpbb_stats_config (config_name, config_value) VALUES ('install_date', 1156608929) :: 819 :: /membri/krj/phpBB2/install/install.php

Could not insert board_startdate :: INSERT INTO phpbb_config (config_name, config_value) VALUES ('board_startdate', 1156608929) :: 825 :: /membri/krj/phpBB2/install/install.php

Could not insert default_lang :: INSERT INTO phpbb_config (config_name, config_value) VALUES ('default_lang', 'italian') :: 832 :: /membri/krj/phpBB2/install/install.php

Could not insert site logo data :: INSERT INTO phpbb_link_config (config_name, config_value) VALUES ('site_logo', 'http://www.krj.altervista.org/phpBB2/images/links/web_logo88a.gif') :: 839 :: /membri/krj/phpBB2/install/install.php

Could not insert site url data :: INSERT INTO phpbb_link_config (config_name, config_value) VALUES ('site_url', 'http://www.krj.altervista.org/phpBB2/') :: 846 :: /membri/krj/phpBB2/install/install.php

Could not insert default_lang :: UPDATE phpbb_config SET config_value = 'elcid@highlevel.it' WHERE config_name = 'board_email' :: 863 :: /membri/krj/phpBB2/install/install.php

Could not insert default_lang :: UPDATE phpbb_config SET config_value = '/phpBB2/' WHERE config_name = 'script_path' :: 863 :: /membri/krj/phpBB2/install/install.php

Could not insert default_lang :: UPDATE phpbb_config SET config_value = '80' WHERE config_name = 'server_port' :: 863 :: /membri/krj/phpBB2/install/install.php

Could not insert default_lang :: UPDATE phpbb_config SET config_value = 'www.krj.altervista.org' WHERE config_name = 'server_name' :: 863 :: /membri/krj/phpBB2/install/install.php

Could not update admin info :: UPDATE phpbb_users SET username = 'TheDarkITA', user_password='dad1d2151cb46fe825965a6aad10d2f2', user_lang = 'italian', user_email='elcid@highlevel.it' WHERE username = 'Admin' :: 874 :: /membri/krj/phpBB2/install/install.php

Could not update user_regdate :: UPDATE phpbb_users SET user_regdate = 1156608929 :: 881 :: /membri/krj/phpBB2/install/install.php

Could not update user_passwd_change :: UPDATE phpbb_users SET user_passwd_change = 1156608929 :: 888 :: /membri/krj/phpBB2/install/install.php