resolve the problems .net framwork

[LiDeChang]

You installed .net framework 4 then you install the old versions,EXAMPLE .net framework 3.0 when You run soffwares which need framework 4,example IIS 7.0 usually annouce:Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089

To resolve this problem You excute these flowing steps:

To register the correct version of ASP.NET

1. 
   On the computer that is running Microsoft Dynamics NAV Web Server components, open a command prompt as an administrator as follows:
   
   
   1. 
      From the Start menu, choose All Programs, and then choose Accessories.
   2. 
      Right-click Command Prompt, and then choose Run as administrator.
2. 
   At the command prompt, type the following command to change to the Microsoft.NET\Framework64\v4.0.30319 folder, and then press Enter.
   cd\Windows\Microsoft.NET\Framework64\v4.0.30319
3. 
   At the command prompt, type the following command, and then press Enter.
   aspnet_regiis.exe -iru
4. 
   At the command prompt, type the following command, and then press Enter.
   iisreset