Special Characters in pasword field


we have spark + Openfire setup without any issues, but now that users are testing (trough ldap connection) there is a problem when users have special characters in there password (à,ö,ë, etc.), if i change my password (beeing administrator) i have the same issue if i try to login the spark client. If i login to the Openfire server administration via the web page there is no issue with the special characters in the password. So it has to be something to do with the spark client.

Does anyone know how to solve this?