Hi CL,
this error occurs if you have wrong connection parameters. look at this:
<?
1 $con = mysql_connect("localhost","DK","root");
2 mysql_select_db("test");
3 mysql_query("select * from blubb",$con) or die(mysql_error());
?>
If you give the wrong connection parameters to mysql_connect, you will get this error at line 3.
Greetings
juggler