diff --git a/lib/validates_timeliness/active_record/multiparameter_attributes.rb b/lib/validates_timeliness/active_record/multiparameter_attributes.rb
index 68de263..a2d4fa6 100644
--- a/lib/validates_timeliness/active_record/multiparameter_attributes.rb
+++ b/lib/validates_timeliness/active_record/multiparameter_attributes.rb
@@ -16,18 +16,16 @@ module ValidatesTimeliness
       def execute_callstack_for_multiparameter_attributes_with_timeliness(callstack)
         errors = []
         callstack.each do |name, values|
-          klass = (self.class.reflect_on_aggregation(name.to_sym) || column_for_attribute(name)).klass
-          if values.empty?
-            send(name + "=", nil)
-          else
-            column = column_for_attribute(name)
+          column = column_for_attribute(name)
+          if column && [:date, :time, :datetime].include?(column.type)
             begin
-              value = if [:date, :time, :datetime].include?(column.type)
-                time_array_to_string(values, column.type)  
+              callstack.delete(name)
+              if values.empty?
+                send("#{name}=", nil)
               else
-                klass.new(*values)
+                value = time_array_to_string(values, column.type)
+                send("#{name}=", value)
               end
-              send(name + "=", value)
             rescue => ex
               errors << ::ActiveRecord::AttributeAssignmentError.new("error on assignment #{values.inspect} to #{name}", ex, name)
             end
@@ -36,10 +34,11 @@ module ValidatesTimeliness
         unless errors.empty?
           raise ::ActiveRecord::MultiparameterAssignmentErrors.new(errors), "#{errors.size} error(s) on assignment of multiparameter attributes"
         end
+        execute_callstack_for_multiparameter_attributes_without_timeliness(callstack)
       end
       
       def time_array_to_string(values, type)
-        values = values.map(&:to_s)
+        values = values.map {|v| v.to_s }
                 
         case type
         when :date