login page

I am currently trying to build a web application but am struggling with the harder aspects of making one. I am trying to create a login page but all the tutorials i can see involve using (user authentication) which is meant to be in server behaviours in dreamweaver but is not. Is there a reason this does not work with asp.net pages, and can anyone give me any advice about how to make a simple log in page.
Thankshttp://www.dotnetjunkies.com/quickstart/aspplus/doc/windowsauth.aspx
http://www.dotnetjunkies.com/quickstart/aspplus/doc/formsauth.aspx

Brian
may I suggest a couple books that have helped me get started:
asp.net uleashed, beginning asp.net a (a wrox book, comes in C# or VB.NET) both have good sections on forms authorization/authentication

also I read a good article on http://aspnet.4guysfromrolla.com/

good luck