virtualbox2.2.4在制作snapshot时，长时间没反应，我强行关机，现在无法加载snapshot

waterloo2005

virtualbox2.2.4在制作snapshot时，长时间没反应，我强行关机，现在无法加载snapshot

提示
Failed to discard the current snapshot and the current state of the virtual machine xp.
Could not copy the state file '/media/bak/vbox/snapshots/{3d951434-e99b-41f2-8770-8c23db5b3b15}.sav' to '/media/bak/vbox/snapshots/{31097015-3a55-4b74-aab9-7d25585fe8b9}.sav' (VERR_FILE_NOT_FOUND).

也无法正常启动虚拟机xp（即不用snapshot）。
甚至不能删除整个虚拟机
请问如何做？谢谢