troubleshooting Question

Updating AJAX dll on site

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flynnyFlag for United Kingdom of Great Britain and Northern Ireland asked on
Microsoft IIS Web ServerASP.NET
4 Comments1 Solution1663 ViewsLast Modified:
Hi all,

Sorry for being dumb here.

I'm getting the following error after updating the AjaxControlToolkit.dll on a site, after copying the new DLL to the bin folder;

Could not load file or assembly 'AjaxControlToolkit' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.

After googling around to fix the issue, I changed the application pool on IIS (Version 7.5.7600) fromt he default site named pool to be ASP.NET Classic (I have also tried Integrated).

However I then get a 500 error when I try to navigate the site?

Can anyone direct me in the right direction please?

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