Open Web Url in Container, rabtabstrip become no function

[THEAM SEONG]

<telerik:RadTabStrip ID="RadTabStrip1" runat="server" MultiPageID="RadMultiPage1"
        Skin="WebBlue" CssClass="RadTabStrip" Font-Bold="True" SelectedIndex="0">
        <Tabs>
            <telerik:RadTab runat="server" Text="DMS Check list Generator" PageViewID="RadPageView1" Selected="True">
            </telerik:RadTab>
            <telerik:RadTab runat="server" Text="Upload & Validation" PageViewID="RadPageView2">
            </telerik:RadTab>
            <telerik:RadTab runat="server" Text="Search & Download" PageViewID="RadPageView3">
            </telerik:RadTab>
        </Tabs>
    </telerik:RadTabStrip>

 

above is my aspx code.

I have created a container to allow user run the exe file and only show in container instead of in IE with link showed. below is the config 

 

<configuration>
  <appSettings>
    <add key="Url" value="http://localhost:56309/User/Login"/>
    <add key="ContainerTitle" value="CMMS eChecklist"/>
    <add key="ContainerWidth" value="1280" />
    <add key="ContainerHeight" value="1024" />
    <add key="MaximizeContainer" value="F" />
    <add key="PageRefreshSeconds" value="0" /> <!--(0 = if no refresh, 3600 = 1 hour)-->
    <add key="ClientSettingsProvider.ServiceUri" value="" />
  </appSettings>
  <system.web>
    <membership defaultProvider="ClientAuthenticationMembershipProvider">
      <providers>
        <add name="ClientAuthenticationMembershipProvider" type="System.Web.ClientServices.Providers.ClientFormsAuthenticationMembershipProvider, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" serviceUri="" />
      </providers>
    </membership>
    <roleManager enabled="true" defaultProvider="ClientRoleProvider">
      <providers>
        <add name="ClientRoleProvider" type="System.Web.ClientServices.Providers.ClientRoleProvider, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" serviceUri="" cacheTimeout="86400" />
      </providers>
    </roleManager>
  </system.web>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
  </startup>
</configuration>

after open in container, the rabtabstrip wont change at all after select another tab. it will change only when open in IE. Please advise

[THEAM SEONG]

solve by put autopostback = true. thanks