ASP.NET tab on IIS Manager does not show while you check the properties of a website configured

While you check the properties for a website in Internet Information Services (IIS), ASP.NET tab does not appear.

The cause of the issue is that the IIS on 64Bit OS is running on 32Bit.

so. you should configure Windows 2003 64 Bit to load the IIS in 64Bit mode.

To enable IIS 6.0 to run 32-bit applications on 64-bit Windows

Open a command prompt change the directory to admins script

1. cd %systemdrive%InetpubAdminScripts

2. Type >> cscript.exe adsutil.vbs set W3SVC/AppPools/Enable32BitAppOnWin64 “true”

3. Press ENTER.

And restard the Webserver by typing iisreset /restart

It should work for  your.

else

Just do a OS restart.