PHP5 and Zend

Hi all, I have a little problem with debugging php application with Zend
Configuration:
WAMP5 (PHP5, Apache, MySQL)
Zend 3.5.2 (Debug Internal)

When debug Zend return this error:

Debug Error: C:\wamp\www\mybar\phputils.inc.php line 42 - Call to undefined
function mysql_pconnect()

but in localhost connection works fine.

I know that is a php.ini ( of Zend ) configuration problem, but I don't know
how configure it.
Thank you for your help.

Bye, Giuseppe