Help!!!, RoundCube don't get Authenticate in Sendmail+AUTH+SSL

[armando]

Hi. I have installed RoundCube in web server with Ubuntu 6.06 and i have an other server that have Solaris 9 x86, where is Sendmail, CyrusSASL, Openssl, IMAP, qpoper. Sendmail has been configured with AUTH and STARTTLS, and the authentication is only allowed with SSL, that works with Oultook, Thunderbird, Eudora, but don't works with RoundCube. I can log in to the server with IMAPS and edit, view, add contacts and identities, but when i try to send a message i get the next error:

SMTP Error: SMTP error: Connection failed: Failed to connect socket: Success in /...../roundcubemail-0.1-rc1/program/steps/mail/sendmail.inc on line 340

this is my main.inc.php:

$rcmail_config['enable_caching'] = FALSE;
$rcmail_config['auto_create_user'] = TRUE;
$rcmail_config['default_host'] = 'ssl://example.com:993';
$rcmail_config['default_port'] = 993;
$rcmail_config['username_domain'] = '';
$rcmail_config['mail_domain'] = '';
$rcmail_config['virtuser_file'] = '';
$rcmail_config['virtuser_query'] = '';
$rcmail_config['smtp_server'] = 'ssl://example.com';
$rcmail_config['smtp_port'] = 465;
$rcmail_config['smtp_user'] = '%u';
$rcmail_config['smtp_pass'] = '%p';
$rcmail_config['smtp_auth_type'] = 'LOGIN';
$rcmail_config['smtp_log'] = TRUE;

It works with an other server without AUTH+STARTTLS. I have been looking for a solution but i haven't found anything. I hope someone cant help me to resolve this problem, or say me that RoundCube don't support SMTP+AUTH+STARTTLS.

Thanks!!!!.
Sorry, my english is very bad.