hello william
yes i can access using localhost server name.i installed dotnetnuke directly with this server name before.i also tried ".\sql2008" as a server name(this name i see when i logout from mylittleadmin db management and login again) but no result.

first i created a blank db from my parallel plesk hosting panel with a user name and password.then
i created a .sql file of my local database using sql publishing wizard and then ran this query file
in my created blank database and all tables,others are placed in my db.and then i included this server db
in the connection string.