Failed in importing configuration file

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IIS7.5

Referring to Exporting and importing Sites and App Pools from IIS 7 and 7.5 | versionestabile[^] , I did the following:
1) exported a server's IIS AppTool configuration file as apptools.xml
2) copied the apptools.xml to another CPU's E:\.
3) right-click the file's property and set its security Everyone, which allows Full control.
4) opened the cmd and pasted

%windir%\system32\inetsrv\appcmd add apppool /in < E:\apppools.xml

But I still got "Can't read configuration file due to insufficient permissions.
What measure should I take to solve this problem? Thanks.

What I have tried:

insufficient permissions in reading configuration file