diff --git a/app/models/memo.rb b/app/models/memo.rb
index 4ca5f888c..56dd3e99c 100644
--- a/app/models/memo.rb
+++ b/app/models/memo.rb
@@ -34,9 +34,9 @@ class Memo < ActiveRecord::Base
 					"forum_id",
 					"last_memo_id",
 					"lock",
+					"sticky",
 					"parent_id",
-					"replies_count",
-					"sticky"
+					"replies_count"
 
 	after_create :add_author_as_watcher, :reset_counters!
 	# after_update :update_memos_forum
@@ -67,10 +67,6 @@ class Memo < ActiveRecord::Base
 		end
 		forum.reset_counters!
 	end
-	
-	def sticky=(arg)
-		write_attribute :sticky, (arg == true || arg.to_s == 'true' ? true : false)
-	end
 
 	def sticky?
 		sticky == 1
@@ -90,10 +86,14 @@ class Memo < ActiveRecord::Base
 	end
 
 	def destroyable_by? user
-		user && user.logged? && Forum.find(self.forum_id).creator_id == user.id || user.admin?
+		(user && user.logged? && (Forum.find(self.forum_id).creator_id == user.id) ) || user.admin?
 		#self.author == user || user.admin?
 	end
 
+	def deleted_attach_able_by? user
+		(user && user.logged? && (self.author == user) ) || user.admin?
+	end
+
 	private
 
 	def add_author_as_watcher
diff --git a/app/views/memos/show.html.erb b/app/views/memos/show.html.erb
index 5bdde8b9c..66b55fd15 100644
--- a/app/views/memos/show.html.erb
+++ b/app/views/memos/show.html.erb
@@ -33,7 +33,7 @@
 			<%= raw @memo.content %>
 			<p>							
 				<% if @memo.attachments.any?%>
-				<% options = {:author => true} %>
+				<% options = {:author => true, :deletable => reply.deleted_attach_able_by?(User.current) } %>
 				<%= render :partial => 'attachments/links', :locals => {:attachments => @memo.attachments, :options => options} %>
 				<% end %>
 			</p>
@@ -81,7 +81,7 @@
 						<!-- <div class="wiki">< %=h reply.content.html_safe %></div> -->
 						<p>
 							<% if reply.attachments.any?%>
-							<% options = {:author => true, :deletable => false} %>
+							<% options = {:author => true, :deletable => reply.deleted_attach_able_by?(User.current) } %>
 							<%= render :partial => 'attachments/links', :locals => {:attachments => reply.attachments, :options => options} %>
 							<% end %>
 						</p>