Help with ASP website - error 404.3. Any takers?

Okay here's the deal. I'm building a website using ASP VBScript, in Dreamweaver 8.

I'm running on Windows Vista Business and I've installed all the IIS 7 stuff.

I'm running IE 7.0

Dreamweaver recognizes that I have all of the things necessary to run ASP pages (a database, a testing server etc.) but everytime I actually try to preview the page in my web browser. it starts to give me a 404.3 error message and then quickly changes to the following page:

click here

It is going to the right location for my pages it just won't display them. I have no idea what to do to get it working! Any help would be greatly appriciated.

Thanks for you time,

Thomas

re: Help with ASP website - error 404.3. Any takers?

[UPDATED] Okay I've narrowed the problem down. My pages will load but only if I haven't added any server behaviors to the page. As soon as I add a server behavior to the page, save it, and then re open it, Ineternet Explorer gives me that damn http 500 error! Can someone help me please?

re: Help with ASP website - error 404.3. Any takers?

Wow, this has got to be frustrating! OK, try something really simple to see if maybe dreamweaver is malfunctioning. Open notepad and type in:
then save as "test.asp" (you will need to include the quotes, notepad will append a different file extension otherwise). When you browse to this, what do you see?

Jared