Thanks Bob for your answer.
However I set the paths ok (AFAIK and I checked many times)

Here is the path:

$thispath = "/usr/local/etc/httpd/htdocs/php/wwwthreads";

include("$thispath/config.inc.php");
include("$thispath/$config[dbtype].inc.php");
include("$thispath/theme.inc.php");

and wwwthreads is the directory where all the files are...

This is also strange (from my error page when running createtable)
Warning: Failed opening '/usr/local/etc/httpd/htdocs/php/wwwthreads/.inc.php' for inclusion (include_path='') in main.inc.php on line 14
=> it doesnt seem to be getting dbtype rigth, and I didn't change that since it's a mysql database....

Also:
Warning: Failed opening '/usr/local/etc/httpd/htdocs/php/wwwthreads/languages//generic.php' for inclusion (include_path='') in main.inc.php on line 44

=> why is there a // before generic.php? I didn't touch the paths at that level...

I may have made mistakes (I am new at wwwthreads and PHP) but I checked the instructions many times and I can not find it. I am also using vservers as my host, form what I read at this forum I will have a hard time installing this on their servers, but this problem seems to be something else...

thanks