Registering Remove Event for Project Online issue

Hi guys!

I have started digging into Project Online and now have new issue. So, I am not sure if it's somehow related to what I have discovered yesterday (SharePoint v16 libraries dont work with Project v15 libraries), but I am not able to register an Remote event receiver in Project Online.

Here is a simple code in my Provider Hosted SharePoint App. I have changed a TokenHelper to get right Project context and its seems to be working: I can get different EPTs, existing Event Handlers etc.

            using (var projectContext = spContext.CreateProjectContextWithContextToken())
            {
                projectContext.ExecuteQuery();
                projectContext.Load(projectContext.Projects);
                projectContext.ExecuteQuery();

                projectContext.Load(projectContext.EventHandlers);
                Microsoft.ProjectServer.Client.EventHandler evh = projectContext.EventHandlers.GetByGuid(EventHandlerUid);
                projectContext.Load(evh);
                projectContext.ExecuteQuery();
                if ((bool)evh.ServerObjectIsNull)
                {
                    projectContext.EventHandlers.Add(new EventHandlerCreationInformation()
                    {
                        EndpointUrl = BaseUrl + "/AppEventReceiver.svc",
                        Id = EventHandlerUid,
                        Name = "Project OnCreating Demo Event",
                        EventId = (int)PSEventID.ProjectCreating,
                        Order = 1,
                        CancelOnError = true
                    });
                    projectContext.EventHandlers.Update();
                    projectContext.ExecuteQuery();
                }
                else
                {
                    projectContext.EventHandlers.Remove(evh);
                    projectContext.EventHandlers.Update();
                    projectContext.ExecuteQuery();
                }

            }

AppEventReceiver.svc 

is a simple class which implements IProjectEventReceiverRemote interface.

However, I have following problems.

1) For some reason, when I am trying to add new EventHandler, ExecuteQuery returns exception for timeout. When I am running the code again, I can see actually that my handler was successfully registered. Removing Handler takes a bit of time, but works fine.

2) As soon as I add new Event Handler, I am not able to create any project. It's just keep showing "It takes some time..." 

In IProjectEventReceiverRemote  I implemented the simple method:

        public ProjectPreEventArgs OnCreatingRemote(Microsoft.Office.Project.Server.Library.PSContextInfo contextInfo, Guid eventHandlerUid, ProjectPreEventArgs e)
        {
            using (var context = new SQLDataContext())
            {
                context.ErrorLogs.InsertOnSubmit(new ErrorLog { errorMessage = "Method Called" });
                context.SubmitChanges();
            }

            if (e.ProjectName.Contains("New"))
            {
                e.CancelReason = "Not good";
                e.Cancel = true;
            }
            return e;
        }

but Its not hit.

Any help will be appreciated!

Thanks

Nick