Database initialization failed

hMailServer installation in windows 2003 (x64) encountered an error as Database initialization failed. I creat开发者_如何学Pythoned a database and new user for that database in Plesk's MySQL database engine. Finally hMailServer asked to copy libmysql.dll file present in bin folder of MySQL to Bin folder of hMailServer installation path. I did it correctly then when I click on retry I am getting this error. I googled for this and found no relevant result and no specific response from hMailServer's forums for previous posts. Can anybody tell me why this error occurred?