My Book Pro Edition 500GB will not mount

I followed the instructions with the following results:

  • The drive does appear after a few minutes in Disk Utility
  • When selected and when I click verify disk, the following message shows:
  • ‘Verify volume failed. Unrecognised file system.’
  • A few moments later, the disk no longer appears I disk utility, the unit stops spinning, and the blue light shines continuosuly and pressing the front button has no effect.

Do you have any further thoughts?

Thanks