problem with Validator Callout Extender

hi ,
I have problem with position of Validator Callout Extender -from ajax toolkit-
it's appear under text box /: also I can't close it , and when I correct the text the balloon doesn't hidden

this snapshot:
http://img104.herosh.com/2011/02/07/309962068.png (http://www.herosh.com)

my code:

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:ValidatorCalloutExtender ID="RegularExpressionValidator1_ValidatorCalloutExtender"
runat="server" TargetControlID="RegularExpressionValidator1">
</asp:ValidatorCalloutExtender>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server"
ErrorMessage="RegularExpressionValidator" ValidationExpression="^\d+$" ControlToValidate="TextBox1"></asp:RegularExpressionValidator>




can any one help me , please

dear user,

Follow this code
<cc1:ValidatorCalloutExtender ID="RegularExpressionValidator1_ValidatorCalloutExtender"
runat="server" TargetControlID="RegularExpressionValidator1">

my visual studio's version is 2010 ,
I can't use cc1 prefix , it's show me error /:

dear user,

add ajax tool kit to your toolbox.then it will refers <cc1>.

I was add it , but it refered to < asp:

project open with Enabled ajax web application?.

add to tool kit- new tab, and right click on it,you get a menu in the menu select "Choose Items" then you get one window,inthat brouse for ajx tool kit .dll file,add to yor page. if youdid not get ajax .dll file in your system,then dowload it.it is easy.

Narasimha Rao K.

I did that ,
and i found ajax toolkit in toolbox
it's refer to <asp:

http://img104.herosh.com/2011/02/09/285234902.png (http://www.herosh.com)


what can I do now?