diff --git a/plugins/mezuro/lib/kalibro/entities/entity.rb b/plugins/mezuro/lib/kalibro/entities/entity.rb
index 0becd38..0e6adbb 100644
--- a/plugins/mezuro/lib/kalibro/entities/entity.rb
+++ b/plugins/mezuro/lib/kalibro/entities/entity.rb
@@ -2,7 +2,7 @@ class Kalibro::Entities::Entity
 
   def self.from_hash(hash)
     entity = self.new
-    hash.each { |field, value| entity.set(field, value) if field != :attributes!}
+    hash.each { |field, value| entity.set(field, value) if field.to_s[0] != '@'}
     entity
   end
 
diff --git a/plugins/mezuro/lib/kalibro/entities/range.rb b/plugins/mezuro/lib/kalibro/entities/range.rb
index 6a86528..d6eafed 100644
--- a/plugins/mezuro/lib/kalibro/entities/range.rb
+++ b/plugins/mezuro/lib/kalibro/entities/range.rb
@@ -12,4 +12,8 @@ class Kalibro::Entities::Range < Kalibro::Entities::Entity
     @end = 1.0/0.0 if value == "INF"
   end
 
+  def grade=(value)
+    @grade = value.to_f
+  end
+
 end
\ No newline at end of file
diff --git a/plugins/mezuro/test/fixtures/compound_metric_fixtures.rb b/plugins/mezuro/test/fixtures/compound_metric_fixtures.rb
index 51bf01c..58cecd7 100644
--- a/plugins/mezuro/test/fixtures/compound_metric_fixtures.rb
+++ b/plugins/mezuro/test/fixtures/compound_metric_fixtures.rb
@@ -4,12 +4,12 @@ class CompoundMetricFixtures
     sc = Kalibro::Entities::CompoundMetric.new
     sc.name = 'Structural Complexity'
     sc.scope = 'CLASS'
-    sc.script = 'return cbo * lcom4;'
+    sc.script = 'return 42;'
     sc
   end
 
   def self.sc_hash
-    {:name => 'Structural Complexity', :scope => 'CLASS', :script => 'return cbo * lcom4;'}
+    {:name => 'Structural Complexity', :scope => 'CLASS', :script => 'return 42;'}
   end
 
 end
diff --git a/plugins/mezuro/test/functional/echo_port_test.rb b/plugins/mezuro/test/functional/echo_port_test.rb
index f568f9f..3739250 100644
--- a/plugins/mezuro/test/functional/echo_port_test.rb
+++ b/plugins/mezuro/test/functional/echo_port_test.rb
@@ -1,6 +1,7 @@
 require "test_helper"
 
 require "#{RAILS_ROOT}/plugins/mezuro/test/fixtures/base_tool_fixtures"
+require "#{RAILS_ROOT}/plugins/mezuro/test/fixtures/configuration_fixtures"
 
 class EchoPortTest < ActiveSupport::TestCase
 
@@ -16,5 +17,12 @@ class EchoPortTest < ActiveSupport::TestCase
     base_tool.name = "echo " + base_tool.name
     assert_equal base_tool, Kalibro::Entities::BaseTool.from_hash(echoed)
   end
+
+  should 'echo configuration' do
+    configuration = ConfigurationFixtures.kalibro_configuration
+    echoed = @port.request(:echo_configuration, {:configuration => configuration.to_hash})[:configuration]
+    configuration.name = "echo " + configuration.name
+    assert_equal configuration, Kalibro::Entities::Configuration.from_hash(echoed)
+  end
   
 end
\ No newline at end of file
--
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