SharePoint 2013 server side event handlers

Hi!

I have Project server 2013 on SharePoint 2013. I'm trying to add custom event handler, but when I click save, form closes without errors, but my event isn't added. On the form I entered:

name: test

assembly name: MyAssembly, Version=1.0.0.0, Culture=neutral, PublicKeyToken=***

class name: Mynamespace.MyEventReceiver

and order: 1. Description and endpoint url I left empty.

I have public class MyEventReceiver : WorkflowEventReceiver (Microsoft.Office.Project.Server.Events) and in it this code:

overridevoidOnStageEntered(Microsoft.Office.Project.Server.Library.PSContextInfocontextInfo,StageEnteredPostEventArgse)

base.OnStageEntered(contextInfo, e);