Hi Nicholas,<br><br>I've not tried any of the software you've described, so this is based entirely from speculation based on what I've read about AACS authentication.<br><br>To me, it sounds most likely that you've inserted a recent disc which has updated the drive so that it no longer provides the media ID without host authentication. Perhaps even the key in older versions of the firmware has been revoked and newer firmwares use a different host authentication key? In fact, I'm very much surprised even that you were able to obtain the media key in the first place.
<br><br>Did you try watching a previously unwatched disc when your troubles began, perhaps? If the first time this failed was watching something you've seen before then you can probably discount my theory, but from what I've read every disc contains a host revocation list and a drive will always update its revocation list from this before the host even knows about the disc insertion.
<br><br>Cheers,<br> Ralf.<br><br><br>