暗黑2大箱子安装问题？？急啊？？？

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我下的是这个版本的暗黑2：
【压箱底分享】暴雪商城《暗黑破坏神2》原版+资料片《毁灭之王》官方下载版（官方种子免CD | 北美英文原版）附序列号+对应繁体包

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我安装大箱子【PlugY10.0(支持所有版本的暗黑) 】时弹出框框显示：

this programm will modify the d2gfx.dll file of the current directory.
before continue,don'tforgot to backup d2gfx.dll if you want
do you want patch d2gfx.dll for the launch of plugv?

我点 是  。后又弹出框框显示：

can't open d2gfx.dll in read/write mode
if diablo 2 is running you can't install plugY,the survival kit.
quit diablo 2 and try again.
我点 确定 。但我进游戏后 存储箱 没变化啊？？？