why invokemember doesn't set a ref parameter

[miguele2012]

i have the follow code:

Type objAddType = Type.GetTypeFromProgID("ClaseCOM");

object objAdd = Activator.CreateInstance(objAddType);

object mConnectionString = "CadenaConexion";

object[] myArguments = { Param1, Param2, mConnectionString, ParamReferencia, Param3, Param4, Param5 };

String[] nombreParam = { "Param1", "Param2", "ConnectionString", "ParamReferencia", "Param3", "Param4", "Param5 " };

ParameterModifier[] pmArray = new ParameterModifier[7]{ new ParameterModifier(1), new ParameterModifier(1), new ParameterModifier(1), new ParameterModifier(1), new ParameterModifier(1), new ParameterModifier(1), new ParameterModifier(1) };

pmArray[3][0] = true;

object retorna = objAddType.InvokeMember("NombreMetodoCOM", BindingFlags.InvokeMethod, Type.DefaultBinder,objAdd,myArguments,pmArray, System.Globalization.CultureInfo.CurrentCulture, nombreParam);

the problem is the variable ParamReferencia doesn't refresh it content