install.php 404 HELP PLEASE

i cannot for the life of me install wordpress onto my new xtreemhost.com site. i have not only read through WP codex docs but also googled so many types of info. i have nowhere else to turn right now and i’m super frustrated. if you can, please help!

i have uploaded all files to: http://ftp.xtreemhost.com
USER: xth_2582038
PW: XXXXXX
/htdocs/wordpress
also tried just /htdocs
ALL I GET IS 404 ERROR EVERYTIME

when editing wp-config i have used the information i created tonight:

define(‘DB_NAME’, ‘xth_2582038_wordpress’); // The name of the database
……..also tried define(‘DB_NAME’, ‘wordpress’); //
define(‘DB_USER’, ‘xth_2582038’); // Your MySQL username
define(‘DB_PASSWORD’, ‘XXXXXX’); // …and password
define(‘DB_HOST’, ‘sql203.xtreemhost.com’); // 99% chance you won’t need

******************* are these values correct for my file?

I then tried to connect to my site using a remote ftp, (cyberduck) with the values
SERVER: http://ftp.xtreemhost.com
USER: xth_2582038
PW: XXXXXX

********* i am able to connect to this, but is this where the mysql files must be stored?? cannot connect directly to the address sql203.xtreemhost.com

once files are installed i should be able to connect to the file http://www.premises.xtreemhost.com/htdocs/wordpress/wp-admin/install.php ?

AARRGH!

sorry to be a n00b to those of you more experienced. bear with me.