Hi dear the discussion above really helped me understand the configuration of dascommerce.
I did following steps
->All the prerequistes.
->configured dashcommerce virtual directory.
->Ran scripts in MSSQL Server management Studion express edition i.e made tables and stored procedures.
->Configured connection string
->Run in IIS.
->When I start the application without debugging it only works on craete a new login and login pages(only show these pages).
->When i click on any other link it simply gives error oops 404 and ....................
->What am i missing?