rake aborted! no such file to load -- spec/rake/spectask

[mashit]

i am getting above error on executing rake db:migrate_plugins

complete trace is

/home/mashit/redmine-1.3.0-1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in gem_original_require' /home/mashit/redmine-1.3.0-1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:inrequire'
/home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/redmine_plugin_support-0.0.5/lib/redmine_plugin_support/rspec_task.rb:7:in define' /home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/redmine_plugin_support-0.0.5/lib/redmine_plugin_support/general_task.rb:6:ininitialize'
/home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/redmine_plugin_support-0.0.5/lib/redmine_plugin_support.rb:53:in new' /home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/redmine_plugin_support-0.0.5/lib/redmine_plugin_support.rb:53:insetup'
/home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/redmine_plugin_support-0.0.5/lib/redmine_plugin_support.rb:43:in each' /home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/redmine_plugin_support-0.0.5/lib/redmine_plugin_support.rb:43:insetup'
/home/mashit/redmine-1.3.0-1/apps/redmine/vendor/plugins/redmine_status/Rakefile:6
/home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in load' /home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:inload_rakefile'
/home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:501:in raw_load_rakefile' /home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:82:inload_rakefile'
/home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in standard_exception_handling' /home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:81:inload_rakefile'
/home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:65:in run' /home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:instandard_exception_handling'
/home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:63:in run' /home/mashit/redmine-1.3.0-1/ruby/lib/ruby/gems/1.8/gems/rake-0.9.2.2/bin/rake:33 /home/mashit/redmine-1.3.0-1/ruby/bin/rake:19:inload'
/home/mashit/redmine-1.3.0-1/ruby/bin/rake:19

can you please provide some directions on how to solve above error.
thnx a lot.