[RCU] roundcube plugin password

Hello, i have no idea where to adress this issue.

I try to use password plugin icm with dbmail becouse i use crypt passwords in my database.

mysql %c does not work (other hashing?)

I found 1 error but no clue where to start fixing while i dont understand php.

[16-Nov-2012 10:32:13 +0100]: PHP Error: Password plugin: Broken driver dbmail in /home/www/page/roundcubemail-0.8.4/plugins/password/password.php on line 258 (POST /?_task=settings&_action=plugin.password-save?_task=&_action=)

I compiled the module in helpers according to the documentation and if i execute it i can change a userpassword.