It didn't update ME, that was the HECI communication problem. The "PDR Region does not exist" is irrelevant.
Try prior bios version 1.5 as already said: http://forum-en.msi.com/index.php?topic=167581.msg1226796#msg1226796
Try prior bios version 1.5 as already said: http://forum-en.msi.com/index.php?topic=167581.msg1226796#msg1226796