Filesystem verify or repair failed

[FiEnDsTeR]

I have been trying to unpartition my hard drice, but every time I click on the minus button to delete the 2 virtual drives, it processes it then after fails and says Partition failed with error: Filesystem verify or repair faile. I have tried verifying and repairing the disks, but this hasn't helped. Why is it doing this? Here is a screenshot of the error: http://arunaurl/2fm4