装enterprise library4.0 时出现 your system has not modify 如何解决呀

装enterprise library4.0 时出现 your system has not modify 怎么解决呀vs2008已经装上了,但装enterprise

装enterprise library4.0 时出现 your system has not modify 怎么解决呀
vs2008已经装上了,但装enterprise library 4.0时出现 your system has not modify 让我稍后再试, 老是装不上,有时能知道怎么解决呀 先谢谢了

[解决办法]
估计是目录权限的问题