DVD plays on stand-alone but 0kb on PC?


I have come across a DVD that plays perfectly in a stand-alone unit but i cannot play it on my PC, infact when exploring the disc all the files in the video_ts directory show as 0kb. I have a pioneer dvr-108 burner with the hacked firmare 1.14 installed. I have dvd region free and anydvd running in the background. i am using dvdxcopy and dvdfab to copy my dvd’s (and normally it all works fine). Powerdvd will not play the disc either!! Is this a new form of copy protection??? Has anyone got any ideas on how to copy this disc??

Thanks for your help