[問題] why I can't install "EasySiteMod"?

[qwertyuiop]

why I can't install "EasySiteMod"?
I see,
// EasySite MOD define('SITE_CONFIG_TABLE', $table_prefix.'site_config'); define('SITE_BANNER_TABLE', $table_prefix.'site_banner'); define('SITE_NEWS_TABLE', $table_prefix.'site_news'); define('SITE_LINKTOME_TABLE', $table_prefix.'site_linktome'); define('SITE_ADDPAGE_TABLE', $table_prefix.'site_addpage'); define('SITE_SEARCH_TABLE', $table_prefix.'site_search');
why?????????????

it is download in http://macphpbbmod.sourceforge.net/