i'm getting this error message:

Fatal error: Cannot instantiate non-existent class: sql_db in /home/hopeless/public_html/db/db.php on line 86

...when i try to get to admin.php. I imported the sql file from the phpnuke folder to my database... what could be the problem?

Ok now I overwrote my previously empty config.php file... (lol..).. and now it gives me these errors:

Parse error: parse error in /home/hopeless/public_html/config.php on line 43

Fatal error: Cannot instantiate non-existent class: sql_db in /home/hopeless/public_html/db/db.php on line 86