方维3.1系统安装是数据库错误

FANWE Database Error
The database has encountered a problem.
Error messages:[Type] dbquery_error
[1046] No database selected
[Query] SELECT * FROM cron WHERE run_time <= '1398298165' ORDER BY run_time DESC
 
Program messages:
[Line: 0007]/data/home/hxu0030594/htdocs/index.php(FanweService->initialize)
[Line: 0058]/data/home/hxu0030594/htdocs/core/fanwe.php(initializeFanwe)
[Line: 0000](CronService->run)
[Line: 0021]/data/home/hxu0030594/htdocs/core/service/cron.service.php(FDB->query)
[Line: 0210]/data/home/hxu0030594/htdocs/core/class/db.class.php(FDB->_execute)
[Line: 0306]/data/home/hxu0030594/htdocs/core/class/db.class.php(FDbMySql->query)
[Line: 0151]/data/home/hxu0030594/htdocs/core/class/mysql.class.php(FDbMySql->halt)
[Line: 0233]/data/home/hxu0030594/htdocs/core/class/mysql.class.php(FanweError->dbError)
[Line: 0125]/data/home/hxu0030594/htdocs/core/class/error.class.php(FanweError->debugBacktrace)各位牛人怎么办啊谢谢