I have developed an AJAX enabled web site on a Vista machine. The page I will be refering to contains ScriptManager, UpdatePanels and CollapsiblePanel. This page works fine on the local machine. However when I deployed this application to a Windows 2003 server (Framework 2.0 and ASP.NET 2.0 AJAX Extensions 1.0 installed) and try to invoke it, I get the following error. Any help will be appreciated.
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Windows Internet Explorer
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Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.
Details: Error parsing near '<!DOCTYPE HTML PUBLI'.
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OK
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Are you using a Firewall on the server, I've seen issues with some firewalls and a setting "Remove Unknown Headers"
Check outhttp://alpascual.com/blog/al/archive/2007/04/26/How-to-fix-Sys.WebForms.PageRequestManagerParserErrorException-in-AJAX.aspx for a potential fix.
Also see this:http://weblogs.asp.net/leftslipper/archive/2007/02/26/sys-webforms-pagerequestmanagerparsererrorexception-what-it-is-and-how-to-avoid-it.aspx for help on debugging the issue.
-Damien
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