Have you ever noticed your IIS 6.0 site is running the wrong version of .net?
This post explains how to change the asp.net version of a specific iis 6.0 website to asp.net 4.0
First find your website using
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -lk
I have limited the output for simplicity below (a you can see the site is using .net 2.0 currently):
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -lk | find "W3SVC/1975602314/root/"
W3SVC/1975602314/root/ 2.0.50727.3053
Run this command to change the site to the .net 4.0 framework:
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -s W3SVC/1975602314/root/ -norestart Start registering ASP.NET (4.0.30319) recursively at W3SVC/1975602314/root/. Finished registering ASP.NET (4.0.30319) recursively at W3SVC/1975602314/root/.
Determine the site’s application pool:
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>C:\Inetpub\AdminScripts\adsutil.vbs get w3svc/1975602314/root/apppoolid apppoolid : (STRING) "some_app_pool_name"
Restart the site’s application pool:
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>cscript %SystemRoot%\System32\IIsApp.vbs /a some_app_pool_name /r Microsoft (R) Windows Script Host Version 5.6 Copyright (C) Microsoft Corporation 1996-2001. All rights reserved. Connecting to server ...Done. Application pool 'some_app_pool_name' recycled successfully.
Verify changes:
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -lk | find "W3SVC/1975602314/root/"
W3SVC/1975602314/root/ 4.0.30319.0
Reference: ASP.NET IIS Registration Tool (Aspnet_regiis.exe)