Docfxit on "BACKUPWORDPRESS store backup in a different location"

I have BACKUPWORDPRESS ver. 2.6.2 installed. The default location for the backup files is \wp-content\backupwordpress-52ce25e2de-backups

From the thread at:
http://wordpress.org/support/topic/advanced-options-help?replies=6
the backup location can be changed to user preferred location. In the wp-config.php file which is located in the root site.

I added the following at the end of wp-config.php

/** Sets up path to the BackupWordpress Backup directory. */
define('HMBKP_path' , 'E:\Backup\TheOfficeWood');

The plugin is still backing up to the default folder.
How can I get it to save the backup files in my alternate folder.

Thank you for a great plugin,

Docfxit