问题原因:微软对sqlserver management 工具进行了更新,去下面的地址下载安装即可
http://www.microsoft.com/downloads/details.aspx?familyid=6053c6f8-82c8-479c-b25b-9aca13141c9e&displaylang=zh-cn#filelist
下载后安装
Windows 7下Visual Studio 2008+ SQL Server 2005安装详解
http://www.cnblogs.com/jaxu/archive/2009/09/23/1572617.html