Migrating guests between 2008 and 2008r2

I've got a VM on 2008r2, that I exported (through Hyper-V Manager) to the server's G: drive. In the folder, I got config.xml file, an empty Snapshots folder, a VHD folder (with .vhd files), and a VM folder (with a .exp file).

When I copy the files over to the G: drive on my 2008 Hyper-V host, I use the GUI to import the VM and point it at the Virtual Machines folder (with the .exp file). After a moment, I get the following error: 

Import failed. Unable to find virtual machine import files under location 'G:\serverName\Virtual Machines\'. You can import a virtual machine only if you used Hyper-V to create and export it.

Event 18020 is also created in the Hyper-V-VMMS event log. 

Should I be able to complete this operation? What am I missing?

Thanks.