Ok. The first problem that Oisole had was that his config.php file had the wrong Password to use to connect to his database.
Also he is running Nuke6.5 and was trying to use the wrong theme pack.
If anyone else has the same sort of problems, the first thing they should do is download the analyzer.php from
http://www.nukecops/com and upload it to the same directory of their config.php file. Then point their browser to
http://www.yoursite.com/analyzer.php
It will tell you any problems if they exist.
mikem