project output not found

HI I completed my web application project so I have to create a set up. On the process of creating the setup 1.After open the file for which the setup is created 2.File->add->new project->setupproject->select websetupproject-> then when i try to add the primary output file by right clicking the setup -> add->primary output I am able view only content files. Can any one of u answer me for this please. Because of this I am not able to create the set up. http://www.15seconds.com/issue/030806.htm I also took the help of above link.