Unable to build full-text index

[tcamargo]

$  fastri-server -B
/home/camargo/.rvm/ruby-1.9.1-p243/bin/fastri-server:57:in `make_full_text_index': uninitialized constant RI (NameError)
    from /home/camargo/.rvm/ruby-1.9.1-p243/bin/fastri-server:141:in `block (2 levels) in <main>'
    from /home/camargo/.rvm/ruby-1.9.1-p243/lib/ruby/1.9.1/optparse.rb:1302:in `call'
    from /home/camargo/.rvm/ruby-1.9.1-p243/lib/ruby/1.9.1/optparse.rb:1302:in `block in parse_in_order'
    from /home/camargo/.rvm/ruby-1.9.1-p243/lib/ruby/1.9.1/optparse.rb:1258:in `catch'
    from /home/camargo/.rvm/ruby-1.9.1-p243/lib/ruby/1.9.1/optparse.rb:1258:in `parse_in_order'
    from /home/camargo/.rvm/ruby-1.9.1-p243/lib/ruby/1.9.1/optparse.rb:1252:in `order!'
    from /home/camargo/.rvm/ruby-1.9.1-p243/lib/ruby/1.9.1/optparse.rb:1343:in `permute!'
    from /home/camargo/.rvm/ruby-1.9.1-p243/lib/ruby/1.9.1/optparse.rb:1364:in `parse!'
    from /home/camargo/.rvm/ruby-1.9.1-p243/bin/fastri-server:109:in `<main>'