dynamic sidebar

[panathos]

Excuse my bad english, i'm italian.

I'm tryin to obtain a "dynamic sidebar": if theme directory contain a file called <slug name>_sd.php, GetSimple include it.
I wrote code below at "components page", in component "sidebar".
Code appear to be valid, but the sidebar don't appear (only html instruction after this code still appear).

<?php $includi = "/theme/miotema/" . return_page_slug() . "_sd.php"; ?>
<?php if (file_exists($includi)) : ?>
<?php include ($includi); ?>
<?php endif; ?>

Below is the code in page "/theme/miotema/contatti_sd.php:

<?php
print "ciao";
?>

How can I obtain a dynamic sidebar?


Thanks
Panathos