服务器发送了意外的返回值(405 Method Not Allowed)，在响应 “MKCOL” 的请求
I managed to solve the problem:
Delete the parent's directory of the folder giving the problem.
Did SVN Update
A folder with the same name as the new one already existed in repository.
Delete this folder
SVN Commit
Copy the new folder, Schedule for addition and SVN Commit
解释一下：
SVN出现这个错误的原因是我删除了一个文件夹后又创建了一个同名文件夹。在svn server端，好像是不能区分这两个文件夹，所以出现了错误。
解决方法：
删除出现错误的文件夹
SVN Update
这时服务器上存在的文件夹会出现在本地
删除原有的文件夹
SVN Commit
重新创建文件夹
SVN Commit