not2easy - 10:24 pm on Jan 19, 2013 (gmt 0)
You will need to edit the wp-config.php file so that the db username and password are relevant to your new db. If you are planning to use the old wp-config.php file you will need to update the path. Be careful not to overwrite one with the other, rename the one you will not be using to keep for a reference if needed.
Are you importing your old db? Did you use a new WP install or just paste all the existing files?