FIX IT: ASP.NET 4.0 registration problem after enabling WCF activation feature in IIS 7

Hi,
If you recently enable WCF HTTP Activation Feature in IIS 7, you might face this prolem when you try to navigate to your WCF service that is targeting .Net Framework 4.0:

Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

To fix it:
1) Open VS Command Prompt.
2) Type the following command to re-install ASP.NET 4.0 and register the right .NET Framework.
aspnet_regiis.exe -iru
3) Refresh your WCF host url, it works :)

Hope this helps.
Regards,
Mostafa Arafa
twitter.com/mostafaelzoghbi