All,
I also had some issues when installing Moodle on a server. What helped me was a file callend phpinfo.php. Just copy the text below into notepad and call it phpinfo.php. Then put it in your rood directory on your server (upload it). Then go to your browser and type in http:\\yourdomain.com\phpinfo.php.
You will get a list of all your variables on your server, mysql etc. This will help you configure the config.php file.
Contents of the file:
<?
phpinfo();
?>
Greetings,