call to undefined function isError() ??

Hi, If I'm getting this error all the time, what am I missing in in the PEAR setup on my machine ?? Call to undefined function: iserror() in /Library/WebServer/Documents/wrox_site/mail_test.php on line 16 abstracted code: var $_oMail; // implement pear mail object $this->_oMail =& Mail::factory("mail"); if (Mail::isError($this->_oMail)) { // line 16!! catchExc($this->_oMail->getMessage()); } am I right in thinking that the main pear libs aren't being included ??? Thanks, Jon jon bennett | jon@jben.net new media designer / developer _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ J b e n . n e t 91 Gloucester Rd, Trowbridge, Wilts, BA14 0AD t: +44 (0) 1225 341039 w: http://www.jben.net/