help please, can't seem to play blu ray movie on pc

[guardiansoul101]

hello guys, new here
so im trying to play the blu ray movie, final fantasy VII advent children complete, on my pc.
My pc is an hp elite, intel core 2 quad with 4 gigs of ram and ATI Radeon HD 3650 graphics card.
my monitor is a 21 inch hp lcd monitor
i have a blu ray rom/drive and i popped the movie in, and it plays for like 5 seconds then it says:
"The content is protected. The content is not allowed to play in current display mode"
my resolution is at 1650 by 1050 pixels
im trying to play it with the "dvd play bd" software that came with my pc
my monitor is connected through DVI input

why can't i seem to play it?
any suggestions?
thanks