BluRay won't playback on PC

[oowbigj49]

Hi, I'm a newbie on this forum and an oldie - so please be patient!!

Have just installed an LG - GGW-H20L unit in my pc. No problem so far - installed the Cyberlink software and updated it - now version 7.3

Built my pc a while back current spec Intel Quad core Q6700 - 4GB ram, ATI HD4850 GPU running XP Pro.

Using Nero 9 with BD plug in - extra £5 - really annoying - apparently Nero does not play BluRay discs even more annoying. Anyway Tried playing BluRay DVD and HD DVD with Cyberlink to no avail - Burned my own video file onto BD-RW with Nero and can't play it back!

Card is supposed to be compliant but didn't think that mattered with non protected DVD's.

Can play standard DVD's OK

Currently have DVI-I connections to 2 PC monitors, but when trying the bought BD DVD had one side of card connected to a compliant monitor.

Switched to VGA exit card still no joy.

When I run the Cyberlink software I can see it accessing the drive and then the software just shuts down if I persist it will reboot the pc.
Any help would be appreciated.
John