Im using umbraco v 4.5.2 and I want to capture the event afterDelete, my code looks like:

public class PageDeleteEvents : ApplicationBase
{
    private Entitycontext db = new Entitycontext ();
    public PageDeleteEvents ()
    {
        Document.AfterDelete += new Document.DeleteEventHandler(Document_AfterDelete);
        Document.BeforeDelete += new Document.DeleteEventHandler(Document_BeforeDelete);

    }

  

    void Document_BeforeDelete(Document sender, umbraco.cms.businesslogic.DeleteEventArgs e)
    {


        throw new Exception(Convert.ToInt32(sender.getProperty("itemID").Value).ToString());


    }

    void Document_AfterDelete(Document sender, umbraco.cms.businesslogic.DeleteEventArgs e)
    {
        throw new Exception(Convert.ToInt32(sender.getProperty("itemID").Value).ToString());




    }

.....

But my problem is that my code doesent get executed, ive tried with beforesave and beforepublish and they are working but the delete events doesent. Any idea why?