svn cp bug of svn-1.7.0-dev for window7

Hello:
        This is my svn version info, and my OS info
        D:\svn_indexer>svn --version
        svn, version 1.7.0-dev (under development)
    compiled Jul 22 2011, 19:11:38

        D:\svn_indexer>systeminfo
        主机名: YUANPEIZHI-PC
        OS 名称: Microsoft Windows 7 家庭普通版
        OS 版本: 6.1.7600 暂缺 Build 7600
        OS 制造商: Microsoft Corporation
   
    when I use svn cp

        D:\svn_indexer>svn cp http://svn1.***.com/arch/keyword/indexer/trunk http://svn1.***.com/arch/keyword/indexer/branches/20110906_comment
        svn: E200007: Error running context
        svn: E200007: Trying to use an unsupported feature
         
        I don't know why! How can I use the 'svn cp' funcion! Thanks!
        

袁佩之
yuanpeizhi_at_360buy.com
2011-09-06 11:24:06
Received on 2011-09-06 08:43:47 CEST