Problem upgrading PEAR

Hi, i can't search any remote packet! I follow the simple step on PEAR site to upgrading pear but now, if I try to search a packet, for example contain the keyword "DB" the result is: matteo@lupin:~$ sudo pear search DB Retrieving data...0%....50%...Invalid xml downloaded from "http://pear.php.net/rest/p/validate_be/info.xml": XML Error: 'Invalid character' on line '17' I try to: matteo@lupin:~$ sudo pear upgrade PEAR Nothing to upgrade and... matteo@lupin:~$ sudo pear channel-update pear.php.net Updating channel "pear.php.net" Channel "pear.php.net" is up to date Have you a solutions?