no data when sending mailshot

fulcrm_mailshot.module

@@ -80,6 +80,6 @@ function fulcrm_mailshot_create_mailshot( $person, $recipient, $campaign_id, $d,
 }
 
 function fulcrm_mailshot_send_mailshot( $mailshot ) {
-    $api_data = fulcrm_apiv2_POST( $mailshot . 'send/' );
+    $api_data = fulcrm_apiv2_POST( $mailshot . 'send/', $data = array() );
     return $api_data[ 'success' ];
 }