Mac OS X 10.7.x is required to 'see' FileVault 2 volumes.  As a result, a Protogo device will not be able to troubleshoot or otherwise access a FileVault 2 protected volume unless it also contains Mac OS X Lion.  In order to achieve this, create a Basic Profile based on a Mac with OS X Lion installed.  Once you have booted from the Protogo device that contains Lion, it will be possible to unlock and troubleshoot a FileVault 2 protected volume.