Hello, after many try, i contact Cisco support. They told me that VPN between a Blackberry and ASA5000 is not supported. Today 14 fév 2013 they don't have any date on when Anyconnect for Blackberry will be available. So we cannot use a Z10 because exchange server is beind the ASA. Protected with the ASA. Apple and Android work well with the AnyConnect and certificat.

http://www.cisco.com/en/US/docs/security/asa/compatibility/asa-vpn-compatibility.html#wp177602

If someone find a way to make them work, share it please.