JbuilderX Mysql database connectio

[assedo]

I use JBuilderX with MySQL Server 4.1
driver ver. - mysql-connector-java-3.1.0-alpha-bin.jar -
i created library Mysql
put renamed mysql-connector-java-3.1.0-alpha-bin.jar as mysql.jar inside Library Folder mysql

Using enterprise setup it created mysql.config
----------------
addpath C:/PROJECT/MYSQL/MYSQL.JAR

-----------------------------------
using database pilot i put name of driver(com.mysql.jdbc.Driver) in the list

service is Ok i connect with Mysql Control Center
but testing connection on Jbuilder connection windows ........error

Communication link failure: java.io.IOException, underlying cause: Unexpected end of input stream

** BEGIN NESTED EXCEPTION **

java.io.IOException
MESSAGE: Unexpected end of input stream

STACKTRACE:

java.io.IOException: Unexpected end of input stream
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:339)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:782)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1585)
at com.mysql.jdbc.Connection.<init>(Connection.java:524)
at com.mysql.jdbc.Driver.connect(Driver.java:359)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at com.borland.dx.sql.dataset.Database.openConnection(Unknown Source)
at com.borland.jbuilder.cmt.editors.l.c(Unknown Source)
at com.borland.jbuilder.cmt.editors.l.actionPerformed(Unknown Source)

...............
** END NESTED EXCEPTION **

trying connection with a new datamodule same problem

** BEGIN NESTED EXCEPTION **

java.io.IOException
MESSAGE: Unexpected end of input stream

STACKTRACE:

java.io.IOException: Unexpected end of input stream
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:339)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:782)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1585)
at com.mysql.jdbc.Connection.<init>(Connection.java:524)
at com.mysql.jdbc.Driver.connect(Driver.java:359)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at com.borland.dx.sql.dataset.Database.openConnection(Unknown Source)
at com.borland.jdbcx.metadata.DatabaseInfo.openConnection(Unknown Source)
at com.borland.jdbcx.metadata.e.run(Unknown Source)

** END NESTED EXCEPTION **
Thanks Adri