diff --git a/booking.variety_form.inc b/booking.variety_form.inc
index d8a3b6d..ebb8d94 100644
--- a/booking.variety_form.inc
+++ b/booking.variety_form.inc
@@ -58,6 +58,8 @@ function booking_variety_regn_form($node, &$form_state)
 			'#required' => TRUE,
 			'#default_value' => '',
       '#options' => _booking_get_variety_timeslot_options($timeslot->tid),
+      '#prefix' => '<div id="booking_variety_session_' . $timeslot->tid . 'wrapper">',
+      '#suffix' => '</div>',          
     );
 	}	
 	
@@ -97,7 +99,7 @@ function booking_variety_session_callback($form, &$form_state) {
     );
     
     
-    $commands[] = ajax_command_replace('booking_variety_session_wrapper', drupal_render($form['variety-sessions'][$fieldname]));
+    $commands[] = ajax_command_replace('#booking_variety_session_' . $timeslot->tid . 'wrapper', drupal_render($form['variety-sessions'][$fieldname]));
 
 
   }