diff --git a/app/controllers/messages_controller.rb b/app/controllers/messages_controller.rb
index 150071b4..c35edfa1 100644
--- a/app/controllers/messages_controller.rb
+++ b/app/controllers/messages_controller.rb
@@ -49,7 +49,7 @@ class MessagesController < ApplicationController
       all
 
     @reply = Message.new(:subject => "RE: #{@message.subject}")
-    if @message.board.project.project_type ==1
+    if @course
       render :action => "show", :layout => "base_courses"#by young
     else
       render :action => "show", :layout => "base_projects"#by young
@@ -138,8 +138,14 @@ private
   end
 
   def find_board
-    @board = Board.find(params[:board_id], :include => :project)
-    @project = @board.project
+    #modify by nwb
+    @board = Board.find(params[:board_id])
+    if @board.project_id != -1 && @board.project_id != nil
+      @project = @board.project
+    elsif  @board.course_id
+      @course = @board.course
+    end
+
   rescue ActiveRecord::RecordNotFound
     render_404
     nil
diff --git a/app/views/messages/show.html.erb b/app/views/messages/show.html.erb
index 4f22fd14..de8bf900 100644
--- a/app/views/messages/show.html.erb
+++ b/app/views/messages/show.html.erb
@@ -92,7 +92,11 @@
 	</div>
 	<div class="memo-section">
 		<div class="memo-title <%= @topic.sticky? ? 'sticky' : '' %> <%= @topic.locked? ? 'locked' : '' %>">
-			<%= label_tag l(:field_subject) %>: <%= link_to @topic.subject, project_boards_path(@topic.project) %>
+          <% if @project %>
+              <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject, project_boards_path(@topic.project) %>
+          <% elsif @course %>
+              <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject, course_boards_path(@topic.course) %>
+          <% end %>
 		</div>
 		<div class="memo-content">
 			<%= textilizable(@topic, :content) %>
diff --git a/lib/redmine.rb b/lib/redmine.rb
index b65a1b68..4550dd49 100644
--- a/lib/redmine.rb
+++ b/lib/redmine.rb
@@ -118,10 +118,20 @@ Redmine::AccessControl.map do |map|
     map.permission :comment_news, {:comments => :create}
     end
   #作业模块权限
-  map.project_module :bids do |map|
+  map.course_module :bids do |map|
     map.permission :view_homework_attaches, {:bids => [:show, :show_project, :revision]}, :read => true
   end
 
+  map.course_module :boards do |map|
+    map.permission :manage_boards, {:boards => [:new, :create, :edit, :update, :destroy]}, :require => :member
+    map.permission :view_messages, {:boards => [:index, :show], :messages => [:show]}, :public => true, :read => true
+    map.permission :add_messages, {:messages => [:new, :reply, :quote]}
+    map.permission :edit_messages, {:messages => :edit}, :require => :member
+    map.permission :edit_own_messages, {:messages => :edit}, :require => :loggedin
+    map.permission :delete_messages, {:messages => :destroy}, :require => :member
+    map.permission :delete_own_messages, {:messages => :destroy}, :require => :loggedin
+  end
+
   #end
 
   map.project_module :issue_tracking do |map|