This MEANS that ASP.Net is not properly registered with IIS. .Net framework provides an Administration utility that manages the installation and UNINSTALLATION of multiple versions of ASP.NET on a single machine. You can find the file in C:\WINNT\Microsoft.NET \Framework\v**\aspnet_regiis.exe
use the COMMAND: aspnet_regiis.exe -u ---> to uninstall current asp.net version.
use the command: aspnet_regiis.exe -i ---> to INSTALL current asp.net version.

For Windows Server 2003, you must use aspnet_regiis -i -enable This is because of the "Web Service Extensions" feature in IIS 6 (if you install VS.NET or the framework without IIS installed, and then GO back in and install IIS afterwards, you have to re-register so that ASP.NET 'hooks' into IIS properly."

This means that ASP.Net is not properly registered with IIS. .Net framework provides an Administration utility that manages the installation and uninstallation of multiple versions of ASP.NET on a single machine. You can find the file in C:\WINNT\Microsoft.NET \Framework\v**\aspnet_regiis.exe
use the command: aspnet_regiis.exe -u ---> to uninstall current asp.net version.
use the command: aspnet_regiis.exe -i ---> to install current asp.net version.

For Windows Server 2003, you must use aspnet_regiis -i -enable This is because of the "Web Service Extensions" feature in IIS 6 (if you install VS.NET or the framework without IIS installed, and then go back in and install IIS afterwards, you have to re-register so that ASP.NET 'hooks' into IIS properly."