ArgumentException on loading loose xaml (Object ... cannot be converted to type 'System.Windows.FrameworkElementFactory')

Problem:

I need to load loose xaml dynamically and create control that will contain UserControl defined in loose xaml

Solution:

uc.xaml

<UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"><UserControl.Resources>		<ControlTemplate ><Border /></ControlTemplate></UserControl.Resources><Grid></Grid></UserControl>

loading method:

using (var sr = new StreamReader("uc.xaml"))
{
	var xamlSchemaContext = new XamlSchemaContext();
	var xmlReaderSettings = new XamlXmlReaderSettings();
	var xamlReader = new XamlXmlReader(sr, xamlSchemaContext, xmlReaderSettings);

	var activityBuilder = XamlServices.Load(xamlReader);
}

the error I get:

InnerException: System.ArgumentException
            Message=Object of type 'System.Windows.Controls.Border' cannot be converted to type 'System.Windows.FrameworkElementFactory'.
            Source=mscorlib
            StackTrace:
                 at System.RuntimeType.TryChangeType(Object value, Binder binder, CultureInfo culture, Boolean needsSpecialCast)
                 at System.RuntimeType.CheckValue(Object value, Binder binder, CultureInfo culture, BindingFlags invokeAttr)
                 at System.Reflection.MethodBase.CheckArguments(Object[] parameters, Binder binder, BindingFlags invokeAttr, CultureInfo culture, Signature sig)
                 at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
                 at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
                 at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
                 at System.Xaml.Schema.SafeReflectionInvoker.InvokeMethodCritical(MethodInfo method, Object instance, Object[] args)
                 at System.Xaml.Schema.SafeReflectionInvoker.InvokeMethod(MethodInfo method, Object instance, Object[] args)
                 at System.Xaml.Schema.XamlMemberInvoker.SetValueSafeCritical(Object instance, Object value)
                 at System.Xaml.Schema.XamlMemberInvoker.SetValue(Object instance, Object value)
                 at MS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(XamlMember member, Object obj, Object value)
                 at MS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(Object inst, XamlMember property, Object value)

does anybody have any idea how to make this code work or overcome anyhow?

thanks in advance