No subclass NSobject in mainmenue.nib xcode 2.5

I am new to any kind of code developing and have started with Xcode 2.5 on my mac powerbook running Tiger 1.4.11.
I only have the "Cohen" Xcode 2 book for reference and have immediately hit a wall following one of their exercises.
In "Classes" I have selected the Cocoa class "NSobject" which should then show a subclass "NSobject" but does not.
How should I proceed or will I just keep hitting problems along the way.
Any help will be appreciated.

I can't picture in my head what you are seeing. I'm thinking you are in Interface Builder somewhere.

NSObject is the root class of all Objective-C classes, which means all other classes are a subclass of it, either directly or through other inheritance. Also, NSObject is not a subclass of another class, so I wouldn't expect it to show a subclass "NSobject".

Interface Builder

Hi, Yes I was in Interface Builder. Created a buttton, text field and moved on to the "hooking-up" section.
Clesses tab in mainMenu.nib > select NSObject from the left column. This should then open a column on the right - including "subclass NSObject".
This "subclass NSObject" does not appear anywhere so I can go no further. As I said I am using xcode 2.5 on my system, but am following xcode 2 literature wise.






Using OSX Tiger 10.4.11- Power PC 1.25GHz 2GB Ram.