ASP.NET snap-in cannot add in IIS

Hi All:

I have a server running MS Server W2003 with
IIS Version:6.0 on it.I don’t see ASP.NET Tab in properties,so I wanted to add in via Add/remove sanp in .But I don’t see it Under the “Extensions” Tab,I don’t see any option to add “AS.NET” .I’ve selected “Snaps in that can be extended “IIS Manager” is selected.”Add all extensions ” is selected.But nothing is there for ASP.NET.Does anybody know why?

Thanks kindly