undefined class/module </a> <a href= http (ArgumentError)

/home/kalin/bin/ruby/lib/ruby/1.6/pstore.rb:98:in `load'
/home/kalin/bin/ruby/lib/ruby/1.6/pstore.rb:98:in `transaction'
./tdiary.rb:543:in `transaction'
./tdiary.rb:1050:in `initialize'
index.rb:34:in `new'
index.rb:34