Problem setting up phpBB

Hi! I am setting up some forums on my site for the first time, using phpBB. I’ve encountered some errors and I am hoping someone here can help me.

I uploaded all the files to the /forums directory on my server and filled out all information on the install page, and came up with the following series of errors:

Warning: main(./…/db/mysql4.php): failed to open stream: No such file or directory in /home/.madeline/fiberslut/ on line 35

Warning: main(): Failed opening ‘./…/db/mysql4.php’ for inclusion (include_path=’.:/usr/local/lib/php’) in /home/.madeline/fiberslut/ on line 35

Fatal error: Cannot instantiate non-existent class: sql_db in /home/.madeline/fiberslut/ on line 60

From these errors, it looks to me like there’s a file missing, and normally I would just re-upload everything, but one thing that confuses me is that .madeline is NOT the machine my site is on. So I must be missing something - can anyone help?