wrong instance allocation (TypeError)

/usr/local/httpd/htdocs/mini/diary/tdiary.rb:479:in `open'
/usr/local/httpd/htdocs/mini/diary/tdiary.rb:479:in `load'
/usr/local/httpd/htdocs/mini/diary/tdiary.rb:402:in `initialize'
/usr/local/httpd/htdocs/mini/diary/index.rb:21