PP 9.5.4 cannot calculate mysql db space when db server is on a windows server

[thesonpham]

My plesk panel (9.5.4) has a separate mysql server (on windows server 2008). When PP calculate statistic for all domain which has DB on that server (windows server), it does not include mysql db space to disk usage, but with mysql DB on the same PP server, mysql space is included to disk usage.
When I check in table psa.disk_usage, allmost rows in dbases columns are zero (except row for domain has db on the same server with PP)

the command /usr/local/psa/admin/sbin/statistics --calculate-one=domain_name does not effect.

Any one can help me ?