Ajax tab control is not working in my master page

Hi Evrybody,
 
Now i implement my project to display in tab wise. for that i move to ajax tab control. But when i run my code nothing to displayed. This is my sample code can any one give me some suggestion out of this.

<ajaxToolkit:TabContainer ID="TabContainer1"  runat="server"
        OnClientActiveTabChanged="ClientFunction"
        Height="371px" Width="100%" ActiveTabIndex="0"
        OnDemand="true" AutoPostBack="true" TabStripPlacement="Top"
        CssClass="ajax__tab_xp" ScrollBars="None" UseVerticalStripPlacement="true"
        VerticalStripWidth="120px"önActiveTabChanged="TabContainer1_ActiveTabChanged" ><ajaxToolkit:TabPanel ID="TabPanel1" HeaderText="View Change Control" Enabled="true"  runat="server" ScrollBars="Auto"><ContentTemplate>
              ........</ContentTemplate></ajaxToolkit:TabPanel><ajaxToolkit:TabPanel  runat="server" ID="TabPanel2" HeaderText="Generate New Change Control"
            Enabled="true" ScrollBars="Auto"  önDemandMode="Once"><ContentTemplate>
            ......</ContentTemplate></ajaxToolkit:TabPanel></ajaxToolkit:TabContainer>

Note: Here i'm using Master page in my master already i have script manager control.