CSOM 2013 set project owner

Hi.

I'm writing a script to create projects in a Project Server 2013 Web App.

But I didn't find how to set the owner of y projects. I would tlike to have a default user. Instead at the creation the owner is always my current account.

My code :

/// <summary>
/// Create a project
/// </summary>
private PublishedProject CreateProject(ProjectsLoopEventArgs args)
{
	//	ProjectsLoopEventArgs contain data I need to create my project
	PublishedProject project = null;

	//  Define required informations
	ProjectCreationInformation projInfo = new ProjectCreationInformation();
	projInfo.Id = Guid.NewGuid();
	projInfo.Name = args.Title;
	projInfo.Description = args.Description;
	projInfo.Start = args.ProjectStartDate.Date;
	projInfo.EnterpriseProjectTypeId = this.ProjectType;

	//  Create the project
	project = this.Context.Projects.Add(projInfo);

	return project;
}

/// <summary>
/// Add a project to the project collection
/// </summary>
private void AddProject(ProjectsLoopEventArgs args)
{
	try
	{
		if (!ExistsProject(args))
		{
			//  create project
			PublishedProject project = CreateProject(args);
			//  update project owner
			project.Owner = this.DefaultResource.User;  //doesnt work
			//  update custom fields
			UpdateProjectCustomFields(project, args);	//set my custom fields values, it works
			//  add it to the project collection
			QueueJob qJob = this.Context.Projects.Update();
			JobState jobState = this.Context.WaitForQueue(qJob, this.Config.Timeout);
			//  if job succeed
			if (jobState == JobState.Success)
			{
				//  raise event
				OnProjectAddedEvent(new ProjectAddedEventArgs(args));
			}
			else
			{
				//  raise event
				OnQueueErrorEvent(new QueueErrorEventArgs(args, jobState, this.Config.Timeout));
			}
		}
		else
		{
			//  raise event
			OnProjectExistsEvent(new ProjectExistsEventArgs(args));
		}
	}
	catch (Exception e)
	{
		OnScriptErrorEvent(new ScriptErrorEventArgs(args, e));
	}
}

Have I miss something ?