Hi Jarvis thx for your help but i take a different way to solve the problem

Last Week I bought 2 books about PHP and started to study it !!!
After 3 days i make little modify to lastXX so now the hack works fine with IIS5.
First:
In the lastxxconfig.php file I add this lines:
// by rostor
$counter = "";
// fine inserimento rostor
So a problem with undefined constant has been solved.
Second:
In the lastxx.php I defined this line with " "
// if the title is more than $len characters, we need to cut it off and add ... to the end
if (strlen($threads["title"]) > $len) {
$title = substr($threads["title"],0,$len);
$title .= "...";
} else {
$title = $threads["title"];
}
// convert the date to a format readable by non-unix geeks

$fd = date($fdt,$threads["lastpost"]);
That's All