asp.net - Only one instance of a ScriptManager can be added to the page -


i'm trying add toolkitscriptmanager page in order use ajaxcontroltoolkit. here code:

<%@ assembly name="$sharepoint.project.assemblyfullname$" %> <%@ assembly name="microsoft.web.commandui, version=14.0.0.0, culture=neutral, publickeytoken=71e9bce111e9429c" %>  <%@ register tagprefix="sharepoint" namespace="microsoft.sharepoint.webcontrols" assembly="microsoft.sharepoint, version=14.0.0.0, culture=neutral, publickeytoken=71e9bce111e9429c" %>  <%@ register tagprefix="utilities" namespace="microsoft.sharepoint.utilities" assembly="microsoft.sharepoint, version=14.0.0.0, culture=neutral, publickeytoken=71e9bce111e9429c" %> <%@ register tagprefix="asp" namespace="system.web.ui" assembly="system.web.extensions, version=3.5.0.0, culture=neutral, publickeytoken=31bf3856ad364e35" %> <%@ import namespace="microsoft.sharepoint" %>  <%@ register tagprefix="webpartpages" namespace="microsoft.sharepoint.webpartpages" assembly="microsoft.sharepoint, version=14.0.0.0, culture=neutral, publickeytoken=71e9bce111e9429c" %> <%@ control language="c#" autoeventwireup="true" codebehind="testingajaxwebpartusercontrol.ascx.cs" inherits="testingajax.testingajaxwebpart.testingajaxwebpartusercontrol" %> <%@ register assembly="ajaxcontroltoolkit" namespace="ajaxcontroltoolkit" tagprefix="cc1" %>  <html> <body> <form> <cc1:toolkitscriptmanager runat="server" id="toolkitscriptmanager"></cc1:toolkitscriptmanager>     <asp:textbox id="textbox2" runat="server"></asp:textbox> <cc1:autocompleteextender id="autocompleteextender1" runat="server"           targetcontrolid="textbox2"          servicemethod="getcompletionlist"          servicepath="testingajaxwebpartusercontrol.ascx.cs"          minimumprefixlength="2"          completioninterval="1000"          enablecaching="true"          completionsetcount="10">         </cc1:autocompleteextender> </form> </body> </html>

however, when load page throws error saying 1 instance of script manager can running. i've been working on problem day , it's driving me nuts. script manager , how disable page load?

you need have asp.net controls , ajax controls inside form tag.


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