move drupal from host to local server like wamp, likes are corrupted !!

hi
i want to run my drupal site on local host, so i download the site root folder from host and then copy it to www folder in wamp
i install DB and confige setting file to new user of DB
the first page of site run correctly an so far everything in correct
but when i click on any link to go to each page it has 404 page not fine error
i copy .htaccess file from drupal to the site folder
but then, all link redirect to localhost first page and i dont know why
please help me
thanks (i am beginner in english , i so sorry for...)