Not able to build my own event handler routine

I am trying to register CommandEventArgs on page load. Its giving a build error - Error    1    Inconsistent accessibility: parameter type 'Feedback.MyCommandEventArgs' is less accessible than method 'Feedback.My_Event(object, Feedback.MyCommandEventArgs)'    E:\WebSite7\Feedback.aspx.cs .i am using the following code:
public delegate void MyEventHandler(object sender, MyCommandEventArgs e);
    public event MyEventHandler MyEvent;

    class MyCommandEventArgs :CommandEventArgs
    {

    }
    
    protected void Page_Load(object sender, EventArgs e)
    {
        this.MyEvent += new MyEventHandler(My_Event);
        MyEvent(this,new MyCommandEventArgs());
    }
&n ...