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Sys is Undefined Error ASP.NET 2.0 Web App with Ajax v1.0.61025


I'm trying to troubleshoot an ASP.NET application that uses Ajax v1.0.61025.  I'm the web administrator and need to set up the application for the developers on several IIS 6 Web servers.  The appliction works fine on most the web servers.  On two of the servers it works fine except for when you first access it in IE 6.  It gives the error "Sys is Undefined".  I've read some posts that you can resolve this by changing the IE settings to Check for newer versions of stored pages Every visit to the page and by turning off Show friendly HTTP error messages.  This works but I'm wondering why the applications behaves differently depending on what web server it is on..

Is there something I can do on the web server to resolve the issue?  The two web servers that I'm having the problem on are VMWare virtual machines that were cloned from existing web servers.  I'm wondering if there could be a problem with the 2.0 framework not being registered properly on these servers since they now have different computer and domain names than what they had originally.  I've tried reregistering the 2.0 framework for the problem app but that didn't resolve the issue.

Any advice on how to resolve the problem server side would be appreciated.
.NET ProgrammingWeb ApplicationsASP.NET

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8/22/2022 - Mon

Have you double checked that AJAX is installed on those servers?  If you have recently installed AJAX on those servers, you may actually need a reboot of the server.  This is how I corrected this issue once before.

We don't have AJAX installed on any of the servers.  The devlopers put their AJAX controls into the bin folder within their application.  The application works fine on all of the servers except for the two that were cloned.

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