diff --git a/enrol/authorize/db/mysql.php b/enrol/authorize/db/mysql.php
index 21e123a0114..b1283fddaa5 100755
--- a/enrol/authorize/db/mysql.php
+++ b/enrol/authorize/db/mysql.php
@@ -26,6 +26,16 @@ function authorize_upgrade($oldversion=0) {
         $curcode = empty($CFG->enrol_currency) ? 'USD' : $CFG->enrol_currency;
         $objcur = get_record("currencies", "code", $curcode);
         table_column('course', '', 'currency', 'integer', '10', 'unsigned', $objcur->id, 'not null', 'cost');
+    }
+
+    if ($oldversion < 2005071600) {
+        // Be sure, only last 4 digit is inserted.
+        table_column('enrol_authorize', 'cclastfour', 'cclastfour', 'integer', '4', 'unsigned', '0', 'not null');
+        table_column('enrol_authorize', 'courseid', 'courseid', 'integer', '10', 'unsigned', '0', 'not null');
+        table_column('enrol_authorize', 'userid ', 'userid ', 'integer', '10', 'unsigned', '0', 'not null');
+	// Add some indexes for speed.
+        execute_sql(" ALTER TABLE `{$CFG->prefix}enrol_authorize` ADD INDEX courseid(courseid) ");
+        execute_sql(" ALTER TABLE `{$CFG->prefix}enrol_authorize` ADD INDEX userid(userid) ");
     }
 
     return $result;
diff --git a/enrol/authorize/db/mysql.sql b/enrol/authorize/db/mysql.sql
index 1b8873d1fd7..b4cc4275900 100755
--- a/enrol/authorize/db/mysql.sql
+++ b/enrol/authorize/db/mysql.sql
@@ -9,4 +9,4 @@ CREATE TABLE `prefix_enrol_authorize` (
   `avscode` char(1) default 'P',
   `transid` varchar(255) default '',
   PRIMARY KEY  (`id`)
-) TYPE=MyISAM COMMENT='Holds all known information about creditcard transactions';
+) TYPE=MyISAM COMMENT='Holds all known information about authorize.net transactions';
diff --git a/enrol/authorize/version.php b/enrol/authorize/version.php
index 257391e361f..4b84fb0ee4a 100755
--- a/enrol/authorize/version.php
+++ b/enrol/authorize/version.php
@@ -1,6 +1,6 @@
 <?PHP // $Id$
 
-$module->version  = 2005071400;
+$module->version  = 2005071600;
 $module->requires = 2004081800;
 
 ?>