Subject : Cannot connect to MySQL server on <host>:3306. Is there a MySQL server running on the machine/port you are trying to connect to? (java.net.UnknownHostException)

----------------------------------------------- hi All ,

I installed DbVisualizer : 4.1 ON : OS : redhat 9 mysql : 3.23.58 Connector/J : 2.0

I'm getting foll error in my Connection Message

--------------------------------------------

Log: problem loading properties: file not found: log.properties (using default) java.lang.NoClassDefFoundError: org/openide/ErrorManager at org.openide.util.RequestProcessor.logger(RequestProcessor.java:297) at org.openide.util.RequestProcessor.access$600(RequestProcessor.java:68) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:663) java.sql.SQLException: Cannot connect to MySQL server on <host>:3306. Is there a MySQL server running on the machine/port you are trying to connect to? (java.net.UnknownHostException) at com.mysql.jdbc.Connection.connectionInit(Unknown Source) at com.mysql.jdbc.jdbc2.Connection.connectionInit(Unknown Source) at com.mysql.jdbc.Driver.connect(Unknown Source) at java.sql.DriverManager.getConnection(DriverManager.java:512) at java.sql.DriverManager.getConnection(DriverManager.java:140) at com.onseven.dbvis.wrapper.DriverManagerImpl.getConnection(DriverManagerImpl.java:40) at com.onseven.dbvis.sql.Database.doConnect(Unknown Source) at com.onseven.dbvis.sql.Database.access$000(Unknown Source) at com.onseven.dbvis.sql.Database$ConnectionCommand.execute(Unknown Source) at se.pureit.util.ThreadCommand.runExecute(ThreadCommand.java:163) at se.pureit.util.ThreadCommand.run(ThreadCommand.java:143) at java.lang.Thread.run(Thread.java:534)

--------------------------------------------------

How can i solve my problem ?? plz advice .

Thanks, soft