Getting Error: 'Sys' is undefined when running newly created ASP.net web site

Hey there,
 
I just installed Visual Web Developer 2010. All I've done at this point is:
1- Clicked on Create new ASP.net web site (NOT the empty one).
2- It creates the web site
3- I click CTL+F5 to run it.
4- It kicks out the error: Error: 'Sys' is undefined
 
If I create an Empty web site, and add my own web page, it runs no problem.
Any ideas? 
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