NoMethodError in News#index

Showing app/views/news/list.rhtml where line #14 raised: 

undefined method `roles' for :false:Symbol

Extracted source (around line #14): 

11: 		<span style='float: right; position: relative; top:-23px; left: -2px'>Posted on: <%=news.create_on%></span>
12: 	
13: 		<div class='news_main_seperator'></div>
14: 		<% restrict_to "(admins) & !blacklist" do %>
15: 			
16: 		<%= link_to 'Edit', :action => 'edit', :id => news %> |
17: 		<%= link_to 'Destroy', { :action => 'destroy', :id => news }, :confirm => 'Are you sure?', :method => :post %>

RAILS_ROOT: /home/rochestercrusaders/apps/crusaders

Application Trace | Framework Trace | Full Trace 
#{RAILS_ROOT}/vendor/plugins/acl_system2/lib/caboose/role_handler.rb:15:in `check'
#{RAILS_ROOT}/vendor/plugins/acl_system2/lib/caboose/logic_parser.rb:43:in `process'
#{RAILS_ROOT}/vendor/plugins/acl_system2/lib/caboose/logic_parser.rb:13:in `process'
#{RAILS_ROOT}/vendor/plugins/acl_system2/lib/caboose/logic_parser.rb:12:in `sub!'
#{RAILS_ROOT}/vendor/plugins/acl_system2/lib/caboose/logic_parser.rb:12:in `process'
#{RAILS_ROOT}/vendor/plugins/acl_system2/lib/caboose/access_control.rb:68:in `permit?'
#{RAILS_ROOT}/vendor/plugins/acl_system2/lib/caboose/access_control.rb:77:in `restrict_to'
(eval):2:in `send'
(eval):2:in `restrict_to'
#{RAILS_ROOT}/app/views/news/list.rhtml:14:in `_run_rhtml_47app47views47news47list46rhtml'
#{RAILS_ROOT}/app/views/news/list.rhtml:3:in `each'
#{RAILS_ROOT}/app/views/news/list.rhtml:3:in `_run_rhtml_47app47views47news47list46rhtml'
#{RAILS_ROOT}/app/controllers/news_controller.rb:7:in `index'

Request

Parameters: None

Show session dump

Response

Headers: {"cookie"=>[], "Cache-Control"=>"no-cache"}