ajax script manager

i have a script manager at my master page, but i have 1 page require a scriptmanager because of cant page 2 scriptmanager hwo should i do? if i open a new webform without attach master page the function can work well? 

<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" EnableHistory="true" EnableSecureHistoryState="false" ScriptMode="Release"></asp:ToolkitScriptManager>