"go to definition" of class method isn't work

I'm copy class sTPG from another version of web-project in App_Code folder, (so
this class is not crossproject). I'm writing in some class (that already existed
in my web-project) method of class sTPG: sTPG.getPCFS(). I'm do mouse
right-click and try go to method definition by "Go To Defintion"
button. Object Browser are showing and there is message: Public Class Object
Member of: System Summary: Supports all classes in the .NET Framework class
hierarchy and provides low-level services to derived classes. This is the
ultimate base class of all classes in the .NET Framework; it is the root of the
type hierarchy. 

 How I can configure VS Studio 2005, to can go to definition of this class's
method?

Well this is thecase when u r adding only reference then it will show object
browser so i suggest u to create a class in ur appcode folder and then copy he
code only

and check it is resolved or not

I already do it, but where is no effect.