PageRequestManagerServerErrorException when using server.transfer

We recently upgraded to ASP.NET 2 AJAX Beta 2 an since we are encountering
the following problem:

STEPS:

1- navigate to a page containing a UpdatePanel using SERVER.TRANSFER
2- click on a button (regardless of type: button, linkButton, imageButton)
3- (first) async call works fine

4 - click again to make second async call and somehow the page path becomes
invalid; the page name is correct but the path seems to belong to the
referer!! (Consequently a 404 server response is returned by the server. see
attached error message )

NOTE: accessing the page using a hyperlink (instead of server.transfer) does
not trigger any problem; unfortunetly our site navigation relies on
server.transfer and using hyperlinks is not an option.

Can you help?


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here is the message:

Sys.WebForms.PageRequestManagerServerErrorException: An unknown error
occurred while processing the request on the server. The status code returned
from the server was: 404


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here is the code of our simple test page:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="beta2Test.aspx.vb"
Inherits="restricted_beta2Test" %><%@ Register
Assembly="Microsoft.Web.Extensions, Version=1.0.61025.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35"Namespace="Microsoft.Web.UI" TagPrefix="asp"
%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>

<html xmlns="http://www.w3.org/1999/xhtml"; >

<head runat="server">

<title>Untitled Page</title>

</head>

<body>

<form id="form1" runat="server">

<div>


</div>

<asp:ScriptManager runat="server">

</asp:ScriptManager>

<asp:UpdatePanel runat="server">

<ContentTemplate>

<asp:Label runat="server" ID="lbltext"></asp:Label>

<br />

<asp:TextBox runat="server" ID="txtText"></asp:TextBox>

<br />

<asp:LinkButton runat="server" ID="lnkBtnText" Text="submit"></asp:LinkButton>

</ContentTemplate>

</asp:UpdatePanel>

</form>

</body>

</html>



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Partial Class restricted_beta2Test

Inherits System.Web.UI.Page

Protected Sub lnkBtnText_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles lnkBtnText.Click

lbltext.Text &= ";" & txtText.Text

End Sub

End Class

TIA
Rachel
.

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