title: AutoCompleteExtender not firing
body: <p>i allready looked through all the answers google gave me, but it didnt help for my problem sorry. (Also the ones Stackoverflow gives me if i write the title)...
  It is inside a <code>&lt;asp:Table&gt;</code></p>
  
  <pre><code>&lt;asp:TableCell&gt;
      &lt;asp:UpdatePanel runat="server" UpdateMode="Conditional" ID="UP3"&gt;
          &lt;ContentTemplate&gt;
              &lt;asp:DropDownList runat="server" ID="SupplierDDL" Visible="false"&gt;
              &lt;/asp:DropDownList&gt;
              &lt;asp:TextBox runat="server" AutoPostBack="true" ID="tbSupplier"&gt;             
              &lt;/asp:TextBox&gt;
              &lt;cc1:AutoCompleteExtender runat="server" ID="AutoCompleteExtender1" TargetControlID="tbSupplier" BehaviorID="skldjfa"
               MinimumPrefixLength="2" EnableCaching="true" ServiceMethod="SelectAllManufacturer"&gt;
              &lt;/cc1:AutoCompleteExtender&gt;
              &lt;asp:HiddenField runat="server" ID="hfSupplier" /
          &lt;/ContentTemplate&gt;
      &lt;/asp:UpdatePanel&gt;
  &lt;/asp:TableCell&gt;
  </code></pre>
  
  <p>Arround this <code>&lt;asp:Table&gt;</code> is also a Updatepanel.</p>
  
  <p>my Servicemethode should be fine:</p>
  
  <pre><code>[System.Web.Services.WebMethod]
  [System.Web.Script.Services.ScriptMethod]
  public string[] SelectAllManufacturer(string prefixText, int count)
  {
      ArrayList filteredList = new ArrayList();
      OracleConnection oracon = GlobalFunctions.DatabaseConnection();
      OracleDataReader oradr;
      oracon.Open();
      OracleCommand oracom = new OracleCommand(Classes.SQL.SQL4global.selectSupplierBySearchString(prefixText.ToLower()), oracon);
      oradr = oracom.ExecuteReader();
      if (oradr.HasRows == true)
      {
          while (oradr.Read())
          {
                  filteredList.Add(AjaxControlToolkit.AutoCompleteExtender.CreateAutoCompleteItem(
                      Convert.ToString(oradr["companyname"]) + " ** " +
                  Convert.ToString(oradr["street"]) + " * " + Convert.ToString(oradr["postalcode"]) + " * " + Convert.ToString(oradr["city"]) + " * " + Convert.ToString(oradr["land"]),
                  Convert.ToString(oradr["ID_Supplier"])));
          }
      }
      oradr.Close();
      oracon.Close();
      return (string[])filteredList.ToArray(typeof(string));
  
  }
  </code></pre>
  
  <p>It gives me no error, it is just not activating the ServiceMethode.</p>