I understand that you are having some issues in order to update the Slingbox SOLO firmware version from a remote location.
We always recommend to apply any update when at the Slingbox location since you might need to adjust some other settings. With this in mind, I recommend you to contact your brother at the Slingbox location in order to apply the latest firmware update.
The following link will provide you with further details:
How do I update the Slingbox Software (firmware) on my Slingbox?