We have a TabStrip in a CallbackPanel. In one PageView there is a DetailsView containing 2 cascaded DropDownLists connected wit a ajaxToolkit:CascadingDropDown. But this didn't work. If I click on "Edit" no elements in the 2nd DropDownLists are listed. There is a web service for this but it isn't called.
Can you explain this?

Thanks Uwe

Hello,
here is the code. I think th eproblem is that I use the CallbackPanel and there is no trigger for the <ajaxToolkit:CascadingDropDown. But without the CallbackPanel I get a Callback error.

<eo:CallbackPanel ID="CallbackPanel1" runat="server" Triggers="{ControlID:DvGrup;Parameter:}">
<eo:TabStrip ID="TabStrip1" runat="server" MultiPageID="MultiPage1">
<TopGroup>
<Items>
<eo:TabItem Text-Html="Allgemein"/>
<eo:TabItem Text-Html="Planung"/>
</Items>
</TopGroup>
</eo:TabStrip>

<eo:MultiPage runat="server" id="MultiPage1">
<!-- Allgemein -->
<eo:PageView id="PvAllg" runat="server">
<asp:DetailsView ID="DvGrup" runat="server" AutoGenerateRows="False" DataKeyNames="id_msgrp" DataSourceID="SqlGrup"
OnItemInserted="DvGrup_ItemInserted" OnItemUpdated="DvGrup_ItemUpdated">
<Fields>
<asp:TemplateField HeaderText="Einrichtung:">
<InsertItemTemplate>
<asp:DropDownList ID="DdEinr" runat="server" DataSourceID="SqlEinr" DataTextField="bezeichng"
DataValueField="id_res"/>
<asp:DropDownList ID="DdUEinr" runat="server" />
<ajaxToolkit:CascadingDropDown ID="CCDd" runat="server" TargetControlID="DdUEinr"
Category="Ressort" ServiceMethod="GetDropDownContentsPageMethod" ParentControlID="DdEinr" />
</InsertItemTemplate>
<ItemTemplate>
<asp:DropDownList ID="DdEinr" runat="server" Enabled="false" DataSourceID="SqlEinr" DataTextField="bezeichng"
DataValueField="id_res" SelectedValue='<%# Eval("ressort") %>'/>
<asp:DropDownList ID="DdUEinr" runat="server" Enabled="false" DataSourceID="SqlUEinr" DataTextField="bezeich"
DataValueField="id_abt" SelectedValue='<%# Eval("abtlg") %>'/>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="DdEinr" runat="server" DataSourceID="SqlEinr" DataTextField="bezeichng"
DataValueField="id_res" SelectedValue='<%# Eval("ressort") %>'/>
<asp:DropDownList ID="DdUEinr" runat="server"/>
<ajaxToolkit:CascadingDropDown ID="CCDd" runat="server" TargetControlID="DdUEinr" SelectedValue='<%# Bind("abtlg") %>'
Category="Ressort" ServiceMethod="GetDropDownContentsPageMethod" ParentControlID="DdEinr" />
</EditItemTemplate>
</asp:TemplateField>
<!-- #include File="CommandButton.txt" -->
</Fields>
</asp:DetailsView>

</eo:PageView>

<!-- Planung -->
<eo:PageView id="PvPlang" runat="server">

</eo:PageView>
</eo:MultiPage>


<asp:HiddenField ID="MGr" runat="server" />
</eo:CallbackPanel>