[help me]

[!--sizeo:1--][span style=\"font-size:8pt;line-height:100%\"][!--/sizeo--]hi : i try to send msg to some email this is the code:
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<?

// The message
$message = "Line 1\nLine 2\nLine 3";


// In case any of our lines are larger than 70 characters, we should use wordwrap()
$message = wordwrap($message, 70);

// Send
mail('a_abd77@hotmail.com', 'My Subject', $message);
?>
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when i try this script the result is
Warning: Server Error in c:\apache\htdocs\ss.php on line 11
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in my php.ini the setting to email function as this:
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mail function]
; For Win32 only.
SMTP = smtp.mail.yahoo.com
smtp_port = 25

;
; For Win32 only.
sendmail_from = PHP_INI_ALL

; For Unix only. You may supply arguments as well (default: 'sendmail -t -i').
;sendmail_path =PHP_INI_SYSTEM
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im used winxp,phptrid,PHP Version 4.1.1
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any one can help me[!--sizec--][/span][!--/sizec--][b]