vmware diskmount无效？

sztopms1

为了操作方便，我安装了一个vmware diskmount，但 /v:n 装载管用，/d却不能卸载！

提示信息是：
The volume was not mounted by VMware-mount.  It may be a network driver or
it may have been mounted using another utility. It cannot be dismounted.

好奇怪的事情！
各位有没遇到过？ 该如何解决呀？