Ejabberd with RIAK

Hi,

I have tried to connect Riak in ejabberd. Buckets are not created .

./configure --prefix=/opt/ejabberd --enable-riak --enable-mysql

auth_method: riak
##
## RIAK:
##
riak_server: localhost
riak_port: 8098
riak_pool_size: 40
riak_start_interval: 30

mod_roster:
db_type: riak
mod_shared_roster:
db_type: riak
mod_stats: {}
mod_time:
iqdisc: one_queue
mod_vcard:
db_type: riak
after make changes from ejabberd.yml file. I run the install command make & make install. But buckets shows empty.

http://localhost:8098/buckets?buckets=true

Anyone provide the complete document for configure Riak in ejabberd.