Not sure if this was mentioned but have you tried flashing the player with the latest firmware update? A lot times, manufacturers can add additional functionality with a quick update.

For example, I have an Oppo DVD player but the first dual layer disc I burned wouldn't work at all! WTF, my old Philips DVP642 works just perfect with DL. Anyways I grabbed the latest firmware update and voila, everything worked.

Try patching your player...