Configuration file error

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ASP.NET

Windows

Win2008

Hi all,

I am trying to encrypt my web.config file from an external application. The strange thing is that the application works on my Windows 7 PC as well as Server 2003, but I keep receiving the following error on Server 2008: Configuration file cannot be created for the requested configuration object. Here is the code that I am making use of:

System.Configuration.Configuration webconfig = WebConfigurationManager.OpenWebConfiguration("/WebService1") as System.Configuration.Configuration;
webconfig.ConnectionStrings.ConnectionStrings.Clear();
webconfig.ConnectionStrings.ConnectionStrings.Add(new System.Configuration.ConnectionStringSettings("connection",
	string.Format("Data Source={0};Initial Catalog={1};Persist Security Info=True;User ID={2};Password={3}", item.DataSource, item.InitialCatelog, item.Username, item.Password)));
System.Configuration.ConfigurationSection section = webconfig.GetSection(webconfig.ConnectionStrings.SectionInformation.SectionName);
section.SectionInformation.ProtectSection("RsaProtectedConfigurationProvider");
webconfig.Save(System.Configuration.ConfigurationSaveMode.Modified);

Any pointers to why I am only receiving the error on Server 2008?
Many thanks in advance.
Kind regards,