SVN说我需要进行清理,但清理失败了

Question

重复: SVN中的工作副本XXX已锁定且清除失败

当我尝试提交时:

Error: Working copy 'D:\Webs\Drupal 6' locked  
Error: Please execute the "Cleanup" command.  

当我尝试清理时:

Cleanup failed to process the following paths:
D:\Webs\Drupal 6

我怎么解决这个问题？