TabPanel conversion from Coolite 0.8 to Ext.net 3.2.1 issue

[jmilton]

I'm updating a Coolite 0.8 asp.net project to Ext.Net 3.2.1 (Our lastest purchase).

I had a TabPanel with five panels in the 0.8 version. The panels were a mix of 2 HTML forms and 3 IFrame tabs.

In the 3.2.1 conversion I can't get the Frames to load if I fill my forms with data from code behind.

If I don't load my forms, the panels will load the frames.

In my example - if you run the page as is - the date fields will fill in Panel1 and Panel2 will be empty. If you comment out the Prefill in the code behind, Panel2 will load the page.

What do I need to do to get both to work together in the 3.2.1 TabPanel control?

protected void Page_Load(object sender, EventArgs e)
  {
    if (!Page.IsPostBack)
    {
      //Comment: Prefill Dates in Panel1
      txtStartDate.Value = DateTime.Now.AddDays(-60).ToShortDateString();
      txtEndDate.Value = DateTime.Now.ToShortDateString();

      //Comment: Load Panel2
      this.Panel2.Loader.Url = "http://Ext.Net";
      this.Panel2.LoadContent();
    }
  }

<ext:TabPanel ID="TabPanel1" runat="server" AutoDoLayout="true">
  <Items>      
    <ext:Panel ID="Panel1" runat="server" Title="Tab 1">        
      <Items>          
        <ext:FieldSet ID="fsVisitHistory" runat="server" Title="" Height="200px">            
          <Content>                            
            <ext:DateField ID="txtStartDate" runat="server" Format="MM/dd/yyyy" Vtype="daterange" AllowBlank="false">                
              <Listeners>                  
                <Render Handler="this.endDateField = '#{txtEndDate}'; this.validate();" Delay="50" />                
              </Listeners>              
            </ext:DateField>                               
            <ext:DateField ID="txtEndDate" runat="server" Format="MM/dd/yyyy" Vtype="daterange" AllowBlank="false">                
              <Listeners>                  
                <Render Handler="this.startDateField = '#{txtStartDate}'; this.validate();" />                
              </Listeners>              
            </ext:DateField>                                     
          </Content>          
        </ext:FieldSet>
       </Items>      
     </ext:Panel>
     <ext:Panel ID="Panel2" runat="server" Title="Tab 2" Height="680" Padding="3">        
  <Loader runat="server" Mode="Frame">
  </Loader>      
</ext:Panel>    
</Items>  
</ext:TabPanel>