Bluray wont play on Pioneer BDC-TD01

[stephscott2]

I have a VAIO VGN-FW51MF, brought 2nd hand,  running windows 7. My bluray drive, Pioneer BDC-TD01, plays DVDs no problem. Played one region B bluray but now just cycles between 0 & 2 seconds on any bluray disk. Using Cyberlink PowerDVD 11.

Any help