Im using IIS 7.5, When i open IIS manager and navigate to my web site, click on the authentication, then i do not see "Forms Authetication" option.
Do i need to reinstall IIS or do i need to re-register .Net 4.0? if yes should i register it from
C:\Windows\Microsoft.NET\Framework\v4.0.30319 or C:\Windows\Microsoft.NET\Framework64\v4.0.30319
The server is 64 bit server.