puzzling error msg in form validation controller

[eluser]n0xie[/eluser]
[quote author="oldnews" date="1245545099"]Precisely! Then what coding mistake is causing the error
[/quote]

Code:

// your code
$this->email->email_from($email, $who);

// the userguide
$this->email->from($email, $who);

method == function or method != function?

http://nl3.php.net/manual/en/language.oop5.basic.php