diff --git a/manifests/admin_instance.pp b/manifests/admin_instance.pp
index 66cc44a..fa7e8b9 100644
--- a/manifests/admin_instance.pp
+++ b/manifests/admin_instance.pp
@@ -1,4 +1,4 @@
-define sedue::admin_instance($user, $instance, $instance_file_content, $config_server) {
+define sedue::admin_instance($user, $instance, $admin_conf, $config_server) {
   sedue::directory { "sedue::${instance}::admin::directory_log":
     user => $user,
     instance => $instance,
@@ -11,13 +11,26 @@
     require => Sedue::Directory["sedue::${instance}::admin::directory_log"]
   }
 
-  file { "sedue::${instance}::admin::instance_file":
-    path => "${sedue_home}/etc/${instance}.instance",
+  # 2011/6/23 Masahiro Nakagawa <nakagawa@preferred.jp>
+  # Virtual resource does not work for unique resource across each instances.
+  # I use 'if !defined' to avoid this problem.
+  if !defined(File["sedue::admin::conf_directory"]) {
+    file { "sedue::admin::conf_directory":
+      path => "${sedue_home}/etc/admin",
+      owner => $user,
+      group => $user,
+      mode => '0755',
+      ensure => 'directory'
+    }
+  }
+
+  file { "sedue::${instance}::admin::conf_file":
+    path => "${sedue_home}/etc/admin/${instance}.conf",
     owner => $user,
     group => $user,
     mode => '0644',
-    content => $instance_file_content,
-    require => File["${instance}_serve_directory"]
+    content => $admin_conf,
+    require => [File["sedue::admin::conf_directory"], File["${instance}_serve_directory"]]
   }
 
   sedue::mongodb { "sedue::${instance}::admin::mongodb":
@@ -26,6 +39,6 @@
     port => $config_server['port'],
     pair => $config_server['pair'],
     run => $config_server['run'],
-    require => File["sedue::${instance}::admin::instance_file"]
+    require => File["sedue::${instance}::admin::conf_file"]
   }
 }