ASP.NET IIS Web.config [Internal Server Error]

Question

I changed PC / Windows (XP -> 7) so IIS (6 -> 7,5) and trying to move my website

But I can\'t run my site from this server . . . error :

Answer 1

I experienced the same issue, and found out that the applicationdeployed was of .NET version 3.5, but the Application pool was using .NET 2.0. That caused the problem you described above. Hope it helps someone.

My error:

HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid. Detailed Error Information
Module IIS Web Core 
Notification BeginRequest 
Handler Not yet determined 
Error Code 0x80070021 

Config Error This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".  
Config File \\?\C:\inetpub\MyService\web.config 
Requested URL http://localhost:80/MyService.svc 
Physical Path C:\inetpub\DeployService\DeployService.svc 
Logon Method Not yet determined 
Logon User Not yet determined 
 Config Source
101:        
  102:      
  103:          
HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid. Detailed Error Information
Module IIS Web Core 
Notification BeginRequest 
Handler Not yet determined 
Error Code 0x80070021 
Config Error This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".  

Config File \\?\C:\inetpub\DeployService\web.config 
Requested URL http://localhost:80/DeployService.svc 
Physical Path C:\inetpub\DeployService\DeployService.svc 
Logon Method Not yet determined 
Logon User Not yet determined 
 Config Source
  101:      
  102:      
  103:          `