Even after doing a manual backup "Last Backup" in the General Pane of Billings Pro Server displays never.
Why is this problem occurring
The "Last Backup" in the General pane of Billings Pro Server only displays the last time when an automatic scheduled backup was performed. It does not consider manual backups.
Go to the Backup pane of Billing Pro Server Admin and configure automatic backups so that it backups up during a period the computer is typically on.