Error on installation, step rake translation_center:synch

[TuuZzee]

Hi,

I am trying to install translation_center into my Rails project but didn't work out yet. Like I wrote in the title I am stuck on the step when we get all current translations to the db (rake translation_center:synch). I tried it even by removing all my translation file, thinking one of them may be broken but still get the error.

Here is the stack trace:
undefined method yaml2db' for TranslationCenter:Module /usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/translation_center-2.0.2/lib/tasks/translation_center.rake:49:inblock (2 levels) in <top (required)>'
/usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:240:in call' /usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:240:inblock in execute'
/usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:235:in each' /usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:235:inexecute'
/usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:179:in block in invoke_with_call_chain' /usr/local/rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/monitor.rb:211:inmon_synchronize'
/usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:172:in invoke_with_call_chain' /usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:165:ininvoke'
/usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:150:in invoke_task' /usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:106:inblock (2 levels) in top_level'
/usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:106:in each' /usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:106:inblock in top_level'
/usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:115:in run_with_threads' /usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:100:intop_level'
/usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:78:in block in run' /usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:176:instandard_exception_handling'
/usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:75:in run' /usr/local/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rake-10.4.2/bin/rake:33:in<top (required)>'
/usr/local/rbenv/versions/2.0.0-p247/bin/rake:23:in load' /usr/local/rbenv/versions/2.0.0-p247/bin/rake:23:in

'

I have follow all the previous step without getting any issues.
My project is running Rails 4 (4.0.12) with ruby '2.0.0'.

Any suggestions ? Thx in advance !