RadAjaxManager does full postBack

[myobis]

Hello people,

I have a proble regarding RadAjaxManager.
I am using 2 RadComboBoxes on a page. The first one loads Locations and the second one loads Events. I use the SelectedIndexChange Event to fill the events comboBox with event according to the selected location and vice versa. ALthough I am using RAdAjaxManager, I am getting a full postback when I select either a location or an event. I should mention that I am using a master page where I have the RadScriptManager. Here is my code:

<asp:Content ID="Content3" ContentPlaceHolderID="MainContent" runat="server">
<telerik:RadAjaxManager runat="server" id="RadAjaxManager1">
         <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="pnlSearchBox" >
                <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="pnlSearchBox"  LoadingPanelID="RadAjaxLoadingPanel1" />
                    </UpdatedControls>
            </telerik:AjaxSetting>
         </AjaxSettings>
            <AjaxSettings >
                <telerik:AjaxSetting AjaxControlID="pnlScheduler" >
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="pnlScheduler" LoadingPanelID="RadAjaxLoadingPanel1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
            </AjaxSettings>
        </telerik:RadAjaxManager>
          <telerik:RadAjaxLoadingPanel id="RadAjaxLoadingPanel1" runat="server" transparency="60" Height="950px"
                    backcolor="White">
                     <br /><br /><br /><br /><br /><br /><br />
                <asp:Image ID="loadingPicture" runat="server" ImageUrl="../App_Themes/myOBIS/picts/loading.gif" />
        </telerik:RadAjaxLoadingPanel>
.
.
.
.
.
 <asp:Panel ID="pnlSearchBox" runat="server">
    <asp:Label ID="lblStandorte" runat="server" Text="<%$ Resources:GlobalLocalization, Standort_%>" />
    <telerik:RadComboBox ID="rcbLocations" runat="server"  AutoPostBack="true"
           EnableEmbeddedSkins="false" Skin="myOBIS" DataTextField="LocationName" DataValueField="LocationId"
                CssClass="field_long" onselectedindexchanged="Locations_SelectedIndexChange" ></telerik:RadComboBox>
 <asp:Label ID="lblProdukte" runat="server" Text="<%$ Resources:GlobalLocalization, Produkt_%>" />
   <telerik:RadComboBox ID="rcbProducts" runat="server"  DataTextField="InternalProductName" DataValueField="ProductId"  EnableEmbeddedSkins="false" Skin="myOBIS"   CssClass="field_long" AutoPostBack="true"
    onselectedindexchanged="Products_SelectedIndexChange" ></telerik:RadComboBox>
          <asp:Panel/>

...

I have also tried to put the locations ComboBox directly as AjaxControlId and updating the Events ComboBox directly but still I get a full postback. I am using the AjaxManager in almost all pages of our Business Application but it doesn't seem to work.
I'd be glad to get some help

[Tsvetina]

Hello,

RadAjax does not allow more than one RadAjaxManager on the page. Instead, in a complex scenario like Master/ContentPages, you should place RadAjaxManager instance on the master page and add a proxy controls to the content pages. More on RadAjaxManagerProxy can be found here.

If this does not fix the problem on your side, I would advise you to open a formal support ticket and send us a runnable sample isolating the desctibed issue, so we can track down its source.

Greetings,
Tsvetina
the Telerik team