From checking around I see there are alot of people having issues getting Nuke to run on lycos, and the main reason appears to be their config settings. Here is an example I found of a working sites settings:
Code:
$dbhost = "localhost";
$dbuname = "";
$dbpass = "";
$dbname = "login_uk_db";
$prefix = "nuke";
$user_prefix = "nuke";
$dbtype = "MySQL";
Apparently you leave the $dbuname and $dbpass empty and for the $dbname you replace the login with your lycos uname (blah_uk_db).
This isn't guaranteed to work, I just searched around on your problem. I found lots of people asking but only this one possible solution.