installed drupal site locally but not working (XAMPP) I want to install the site from the server locally so I can test changes before performing them.

So:


I exported the database and installed it locally
I downloaded all the files that were inside the site root folder and put them in a root folder locally (but with another name)
I changed the parameter $db_url and $base_url


The problem is that the front page is shown correctly but when I click to go to another page from the menu it says:

[an error occurred while processing this directive] The requested URL was not found on this server. The link on the referring page seems to be wrong or outdated. Please inform the author of that page about the error. [an error occurred while processing this directive]

Anyone have any idea?

NOTE: I just noticed that the url is something like this: http://localhost/root//articles/article-one

Thank you
One reason for this can be 'the apache server's rewrite mod is not enabled'.

See if 


  localhost/sitename/index.php?q=user/login


is working.

If that is working then try enabling Clean URL (sudo a2enmod rewrite for LAMP).

Few links that can be related to the problems.

http://drupal.org/node/1186762

http://drupal.org/node/333675