Only one instance of a ScriptManager can be added to the page: issue with Ajax Toolkit?

I am on visual studio 2012. I need to add in the CollapsablePanelExtender for my site. Because there is a ScriptManager on the MasterPage, I cannot figure out how I can add in the ToolkitScriptManager. When I try to use Scriptmanagerproxy, the web.config crashes and tells me I must use ToolkitScriptManager. When I use my toolkitscriptmanager with the master page's scriptmanager, the site also crashes and says ToolkitScriptManager cannot be found, and "only one instance of ScripManager is allowed.

I have the following code on the masterPage

<asp:ScriptManager runat="server"><Scripts><%--Framework Scripts--%><asp:ScriptReference Name="MsAjaxBundle" /><asp:ScriptReference Name="jquery" /><asp:ScriptReference Name="jquery.ui.combined" /><asp:ScriptReference Name="WebForms.js" Assembly="System.Web" Path="~/Scripts/WebForms/WebForms.js" /><asp:ScriptReference Name="WebUIValidation.js" Assembly="System.Web" Path="~/Scripts/WebForms/WebUIValidation.js" /><asp:ScriptReference Name="MenuStandards.js" Assembly="System.Web" Path="~/Scripts/WebForms/MenuStandards.js" /><asp:ScriptReference Name="GridView.js" Assembly="System.Web" Path="~/Scripts/WebForms/GridView.js" /><asp:ScriptReference Name="DetailsView.js" Assembly="System.Web" Path="~/Scripts/WebForms/DetailsView.js" /><asp:ScriptReference Name="TreeView.js" Assembly="System.Web" Path="~/Scripts/WebForms/TreeView.js" /><asp:ScriptReference Name="WebParts.js" Assembly="System.Web" Path="~/Scripts/WebForms/WebParts.js" /><asp:ScriptReference Name="Focus.js" Assembly="System.Web" Path="~/Scripts/WebForms/Focus.js" /><asp:ScriptReference Name="WebFormsBundle" /><%--Site Scripts--%></Scripts></asp:ScriptManager>

And I have the following code to be used in an actual page.

<asp:ToolkitScriptManager ID="ToolkitScriptManager2" runat="server"></asp:ToolkitScriptManager><h3>We suggest the following:</h3><ol class="round"><li class="one"><asp:Panel ID="pnlRec" runat="server"><h5>Getting Started with Recreation</h5><br /><asp:Label ID="lblMsg" runat="server" Text="Label"></asp:Label></asp:Panel><asp:Panel ID="cpnlRec" runat="server"><table><tr><td>Stuff</td><td>Stuff</td><td>Stuff</td></tr></table></asp:Panel><asp:CollapsiblePanelExtender  ID="cpeRec" runat="server"  CollapseControlID="cpnlRec" Collapsed="True" 
                ExpandControlID="cpnlRec" CollapsedText="Show" ExpandedText="Hide" TextLabelID="lblMsg" TargetControlID="cpnlRec"></asp:CollapsiblePanelExtender>