Commented Issue: Could not find any resources appropriate for ... AjaxControlToolkit.Properties.Resources.NET4.resources [27208]

Hi, please help with Error:

===
MissingManifestResourceException was unhandled by user code
-----------------------------------------------------------
Could not find any resources appropriate for the specified culture or the neutral culture.
Make sure "AjaxControlToolkit.Properties.Resources.NET4.resources" was correctly embedded
or linked into assembly "AjaxControlToolkit" at compile time, or that all the satellite
assemblies required are loadable and fully signed.
===

I'm installed DLL ajaxcontroltookit and i can't compiled any solution/project.
Comments: Solution: Add to form: <asp:ScriptManager ID="ScriptManager1" runat="server" /> or <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" /> Thanks to: http://blog.oscarscode.com/es/dot-net-es/comenzando-con-asp-net-ajax-control-toolkit/