Converter 5.5.3 unable to detect GPT volume on source machine?

Hi guys,

I am attempting to convert a physical Windows Web Server 2008 to a VM running on an ESXi 5.5 host through a VCSA 5.5 vCenter server.

As I go through the wizard and land on the final summary page, I am only seeing the C:\ drive of the source machine when in fact, there is another volume (4TB in size) seen by Windows as the Z:\ drive.

Any idea why the converter is only seeing the C: drive? I read that GPT disks are supported as of v. 5.1 of the converter.

Thanks for any help.