problem with vitual safe source setting

Hi All ,
I am working in dot net 2005 with three level (data acess layer, business logic layer, and prentation layer).When I add this project in save sorce it could not copy /update dll files from data Access layer to business logic layer and from
business logic layer to presentation layer and project shows error .when i run this project with out save source adding it works fine.Please guide me if any one know this problem.

Thanks in advance.