Hello Zippo,
There was a Hotfix a couple of weeks ago to update the Shadow Protect engine to version 5. Can you verify that your Kserver is up to date and then try the install again.
>System >Configure - Get Latest Hotfixes
When you are prompted to "download the latest StorageCraft installer" is there a 'yes' button to click to allow the download to complete?
Regards,
Wayne