Problem with remote web.config encryption

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IIS7

C#

IIS

C#4.0

Good Day

I have googled to no avail and I was wondering if anyone can help me. I need to change the web.config of a remote site in c#. Then encrypt the web.config section and be able to decrypt it to make changes again. We are running iis7.

I have managed to make changes to the remote web.config with no problem. But as soon as I encrypt the Connection string section and then try to update it. I Get "configuration section encryption is not supported iis7" when the web.config is Encrypted when it is not Encrypted it works.

The Code I am using is

ServerManager iisManager = new ServerManager();
  Microsoft.Web.Administration.Configuration config = iisManager.GetWebConfiguration(ddListSites.SelectedItem.Value.ToString());

                    ConfigurationSection connectionStringsSection = config.GetSection("connectionStrings");
                    ConfigurationElementCollection appSettingsCollection = connectionStringsSection.GetCollection();

                    foreach (ConfigurationElement conlist in appSettingsCollection)
                    {
                        string Name = conlist.Attributes[1].Value.ToString();
                        string Constring = conlist.Attributes[0].Value.ToString();
                        string ConstringAttributeName = conlist.Attributes[0].Name.ToString();

                        if (Name == ddlistConnections.SelectedItem.Text)
                        {

                            conlist.Attributes[0].Value = newconnection;
                            iisManager.CommitChanges();

                        }

                    }

I cannot use the following because it is not a local web.config

Configuration config = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);
       //open the connection strings section
       ConfigurationSection section = config.GetSection("connectionStrings");

       //check to make sure it is not already encrypted
       if (!section.SectionInformation.IsProtected)
       {
           //encrypt it with RSA Protection
           section.SectionInformation.ProtectSection("RsaProtectedConfigurationProvider");
           //save the config file
           config.Save();
       }

The requirement is that the web.config must be encrypted

Any help or pointers would be gladly appreciated.

Kind regards
Divan