Unable to use external keystore for SSL

When I try to add the following attributs :

• ads-ldapServerKeystoreFile
• ads-ldapservercertificatepassword

to :

-ads-serverId=ldapServer,ou=servers,ads-directoryServiceId=default,ou=config

I get this kind of exception :

[2012-11-09 15:21:48] WARN [org.apache.directory.shared.ldap.model.entry.DefaultEntry] - The attribute 'ads-ldapservercertificatepassword' cannot be stored
[2012-11-09 15:21:48] ERROR [org.apache.directory.server.wrapper.ApacheDsTanukiWrapper] - Failed to start the service.
org.apache.directory.shared.ldap.model.exception.LdapOtherException: ERR_04269 ATTRIBUTE_TYPE for OID ads-ldapservercertificatepassword does not exist!
at org.apache.directory.server.core.api.partition.AbstractPartition.initialize(AbstractPartition.java:77)
at org.apache.directory.server.ApacheDsService.initConfigPartition(ApacheDsService.java:284)
at org.apache.directory.server.ApacheDsService.start(ApacheDsService.java:166)
at org.apache.directory.server.wrapper.ApacheDsTanukiWrapper.start(ApacheDsTanukiWrapper.java:72)
at org.tanukisoftware.wrapper.WrapperManager$12.run(WrapperManager.java:2788)
Caused by: org.apache.directory.shared.ldap.model.exception.LdapNoSuchAttributeException: ERR_04269 ATTRIBUTE_TYPE for OID ads-ldapservercertificatepassword does not exist!
at org.apache.directory.shared.ldap.model.schema.registries.DefaultAttributeTypeRegistry.lookup(DefaultAttributeTypeRegistry.java:317)
at org.apache.directory.shared.ldap.model.schema.registries.DefaultAttributeTypeRegistry.lookup(DefaultAttributeTypeRegistry.java:47)
at org.apache.directory.shared.ldap.schemamanager.impl.DefaultSchemaManager.lookupAttributeTypeRegistry(DefaultSchemaManager.java:1623)
at org.apache.directory.shared.ldap.model.entry.DefaultEntry.<init>(DefaultEntry.java:310)
at org.apache.directory.server.core.partition.ldif.SingleFileLdifPartition.loadEntries(SingleFileLdifPartition.java:163)
at org.apache.directory.server.core.partition.ldif.SingleFileLdifPartition.doInit(SingleFileLdifPartition.java:123)
at org.apache.directory.server.core.api.partition.AbstractPartition.initialize(AbstractPartition.java:72)
... 4 more
Caused by: org.apache.directory.shared.ldap.model.exception.LdapException: ERR_04269 ATTRIBUTE_TYPE for OID ads-ldapservercertificatepassword does not exist!
at org.apache.directory.shared.ldap.model.schema.registries.DefaultSchemaObjectRegistry.lookup(DefaultSchemaObjectRegistry.java:176)
at org.apache.directory.shared.ldap.model.schema.registries.DefaultAttributeTypeRegistry.lookup(DefaultAttributeTypeRegistry.java:313)
... 10 more

However it works fine in the apache directory studio with a previous version of the apache directory.