install.php doesn’t make database tables (?)

Hi !
I’m trying to install WP 2.5 – this is my first install of WP, so maybe I’m doing something wrong… After filling wp-config.php I’m accessing install.php, and then I’m getting ‘no page found’ info. When I put wrong info in config (ie. non-existing db name), the install.php returns info about wrong data. So the path is good, and install is where it should be. Next, I turned on error logging on php, and it says that when I’m trying to run install.php “WordPress database error Table ‘wordpress.wp_options’ doesn’t exist for query SELECT blahblahblah”. So the tables aren’t created, and now is my question – why, and what can I do ? php have privileges to create tables on mysql (I think), and mysql doesn’t turn any error log… ??