Comments on: AjaxControlToolkit causes System.Security.SecurityException: Request for the permission of type ‘System.Web.AspNetHostingPermission … failed.

By: Soorya

Soorya — Sat, 02 Jul 2011 07:45:52 +0000

Yes. Changing the Identity to “Network Service” in the application worked. Thanks for your information Dan . This is the simplest solution.

By: Tshepang

Tshepang — Thu, 18 Nov 2010 13:49:16 +0000

Worked perfectly after changing application pool. This was the simplest solution .Thanks Dan.

By: tomH

tomH — Tue, 09 Nov 2010 20:26:37 +0000

This worked for me as well.

By: Derek

Derek — Wed, 13 Oct 2010 19:14:12 +0000

Thank you very much! The unblock & IIS restart solved this pesky problem.
ditto! after search the web for 4+ hours, you guys rocks!

By: Vic

Vic — Wed, 06 Oct 2010 16:28:14 +0000

Yep, changing the Application Pool Identity did the trick, but I don’t know why. The settings (basic and advanced) of the new identity are the same as the default. I also unblocked the toolkit dll, cleared the temp files, restarted iis, this did not work. Thanks, Dan.

By: Khuzaima Shajapurwala

Khuzaima Shajapurwala — Thu, 02 Sep 2010 11:43:26 +0000

Thanks Simon, It worked great…Right Click–>Unblock.

Ajax Script manager has to be added to the page where you want to use AJAX toolkit controls.

By: James

James — Fri, 20 Aug 2010 18:53:54 +0000

Thank you very much! The unblock & IIS restart solved this pesky problem.

By: Krishnada

Krishnada — Wed, 28 Jul 2010 18:30:25 +0000

Thanks alot Dan. I was able to fix my issue by changing the application pool Identity to Network Service.

By: Krishnada

Krishnada — Wed, 28 Jul 2010 18:20:05 +0000

I am using IIS 7

By: Krishnada

Krishnada — Wed, 28 Jul 2010 18:19:42 +0000

Hi All,

I am also facing the same issue. But I tried all sorts of suggestions listed above. I am not able to fix this issue at all.
I am trying to fix this from the last 3 days. Can some one help me what should I do to fix this.

Let me be more detailed about the issue. I developed a vs2008 app and included ajax control tool kit in it. It is working fine locally.
when I deployed it to server it is not working and I am getting the security error.

Things I tried
————–
1. deleting the app and readding it
2. adding permissions
3. adding trust level = “Full” to web.config
4. adding the .dll’s all with the same time stamp.
5. adding caspol full trust
6. enabling read
7. Generating a new (clean) web.config with defaults only
8. Turning on ‘Script & Executable’ permissions on the virtual web

Nothing seems to work for me. Please help.