I am getting an error
Server Error in '/' Application.
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<machineKey validationKey="***"  decryptionKey="***" decryption="3DES" validation="SHA1" />

Source File: E:\inetpub\vhosts\mywebsite.com\httpdocs\website\web.config    Line: 68
 

Show Additional Configuration Errors:

It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level.  This error can be caused by a virtual directory not being configured as an application in IIS. (E:\inetpub\vhosts\mywebsite.com\httpdocs\website\web.config line 125)
It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level.  This error can be caused by a virtual directory not being configured as an application in IIS. (E:\inetpub\vhosts\mywebsite.com\httpdocs\website\web.config line 188)
It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level.  This error can be caused by a virtual directory not being configured as an application in IIS. (E:\inetpub\vhosts\mywebsite.com\httpdocs\website\web.config line 196)
Sections must only appear once per config file.  See the help topic  for exceptions. (E:\inetpub\vhosts\mywebsite.com\httpdocs\website\web.config line 229)
                     
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Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42

I am using Parallels Plesk to Host mywebsite on the remote server, while doing installation of DNN I get this error.
File manager shows (Listed below are few of Important Files and Folders)
mywebsite.com/httpdocs (Parallels suggested me that I should upload FTP my webapplication file on this folder)
mywebsite.com/httpdocs/DotNetNuke (Inside this Folder is my webapplication)
mywebsite.com/Website
mywebsite.com/Website/Install
mywebsite.com/Website/Install/install.aspx (I run this in URL)
mywebsite.com/web.config
mywebsite.com/httpdocs/web.config (This config file has lots of tags and settings provided by DNN)

Folder DotNetNuke is made virtual and 'create application' setting is also 'on' for this Folder
 

Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level.  This error can be caused by a virtual directory not being configured as an application in IIS.

Source Error:

Line 66:  
Line 67:  
Line 68:   Line 69

[Moderator edit: keys removed]