Hi Rami,
It seems that you try to configure both the "main" and "wcb" customer application in one application.
That is not possible!
Unfortunately I'm not aware of the documentation you are using. But I would recommend to check the Development and extension guide which is available on the service marketplace. See Chapter 9: Extension How-tos, which describe in detail the creation of both customer "main" and "wcb" application.
Regards Wolfgang