title: SelectedIndexChanged doesn't work!
body: <p>My code:</p>
  
  <p>*.aspx:</p>
  
  <pre><code>&lt;asp:DropDownList ID="CountryList" CssClass="CountryList" runat="server" 
             OnSelectedIndexChanged="CountryList_SelectedIndexChanged" /&gt;
  </code></pre>
  
  <p>
  
  </p>
  
  <p>*.aspx.cs:</p>
  
  <pre><code>protected void Page_Load(object sender, EventArgs e)
  {
     CountryList.SelectedIndexChanged += 
                            new EventHandler(CountryList_SelectedIndexChanged);
     ...  
  }
  
  protected void CountryList_SelectedIndexChanged(object sender, EventArgs e)
  {
     LoadCityList(CountryList, CityList);
  }
  </code></pre>
  
  <p>But this doesn't work. </p>