Error on 'block.module' - 'user.module' - 'database.inc'

Hello everybody!
I have some problems with installation Drupal 6.2.

My specifications are: - linux - ubuntu - phpmyadmin 2.11.5 - mysql 5.0.42 - apache 2.2.4 - php 5.2.3

After creating my first account, and push botton 'Save configuration', the next page is full of errors:

    * warning: array_fill() [function.array-fill]: Number of elements must be positive in /var/www/html/includes/database.inc on line 231.

    * warning: implode() [function.implode]: Bad arguments. in /var/www/html/includes/database.inc on line 231.

    * warning: array_keys() [function.array-keys]: The first argument should be an array in /var/www/html/modules/user/user.module on line 500.

    * user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 query: SELECT p.perm FROM role r INNER JOIN permission p ON p.rid = r.rid WHERE r.rid IN () in /var/www/html/modules/user/user.module on line 500.

    * warning: array_keys() [function.array-keys]: The first argument should be an array in /var/www/html/modules/block/block.module on line 406.

    * warning: array_fill() [function.array-fill]: Number of elements must be positive in /var/www/html/includes/database.inc on line 231.

    * warning: implode() [function.implode]: Bad arguments. in /var/www/html/includes/database.inc on line 231.

    * warning: array_merge() [function.array-merge]: Argument #2 is not an array in /var/www/html/modules/block/block.module on line 407.

    * user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') OR r.rid IS NULL) ORDER BY b.region, b.weight, b.module' at line 1 query: SELECT DISTINCT b.* FROM blocks b LEFT JOIN blocks_roles r ON b.module = r.module AND b.delta = r.delta WHERE b.theme = '' AND b.status = 1 AND (r.rid IN () OR r.rid IS NULL) ORDER BY b.region, b.weight, b.module in /var/www/html/modules/block/block.module on line 407.

I tried to disable modules but nothing!
I have also online searches but have not changed my situation.

Can you help me?
Thank you :)

Bye ;)