can not be used in redmine 1.3.x

[archonwang]

error information as follows：

=> Rails 2.3.14 application starting on http://0.0.0.0:3000
NOTE: SourceIndex.new(hash) is deprecated; From C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/r
ails/vendor_gem_source_index.rb:100:in new'. C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:ingem_original_require': no such f
ile to load -- graphviz (MissingSourceFile)
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in require' from C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies. rb:184:inrequire'
from E:/redmine-1.3/vendor/plugins/redmine_relations_graph/lib/issue_relation_chart.rb:1
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in gem_original_requir e' from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:inrequire'
from C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.
rb:184:in require' from C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies. rb:291:inrequire_or_load'
from C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.
rb:250:in depend_on' from C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies. rb:162:inrequire_dependency'
from E:/redmine-1.3/vendor/plugins/redmine_relations_graph/init.rb:7:in evaluate_init_rb' from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/rails/plugin.rb:158:inevaluate_ini
t_rb'
from C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/core_ext/kern
el/reporting.rb:11:in silence_warnings' from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/rails/plugin.rb:154:inevaluate_ini
t_rb'
from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/rails/plugin.rb:48:in load' from E:/redmine-1.3/config/../vendor/plugins/engines/lib/engines/plugin.rb:44:inload'
from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/rails/plugin/loader.rb:38:in load_p lugins' from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/rails/plugin/loader.rb:37:ineach'
from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/rails/plugin/loader.rb:37:in load_p lugins' from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/initializer.rb:369:inload_plugins'

    from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/initializer.rb:165:in `process'
    from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/initializer.rb:113:in `send'
    from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/initializer.rb:113:in `run'
    from E:/redmine-1.3/config/environment.rb:24
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_requir

e'
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in require' from C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies. rb:182:inrequire'
from C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.
rb:547:in new_constants_in' from C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies. rb:182:inrequire'
from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/commands/server.rb:84
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in gem_original_requir e' from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:inrequire'
from script/server:3