PC will not play burnt Bluray disc

[pazzaz]

I am using Movie Factory 6Plus with HD Pack. After importing an MPEG 2 file and setting chapter points and creating a menu the file is seamingly burnt OK onto a Sony BD-RE 25GB Bluray disc in PAL format. Thing is it will not play back in the Bluray drive. I have a Sony BWU-100A burner which I have updated with the latest firmware running in a dual core Win XP Pro 5GB memmory and two SATA raide drive PC.

The software which came with the burner Cyberlink PowerProducer is very basic but it burns and plays back Bluray discs using PowerDVD 6.6BD just fine ! I would much rather use Movie Factory especially as it cost me 50 quid and the Cyberlink was free !

Any ideas greatly appreciated.