Java Connector Samples Problem

I'm trying to run the demo program BE_DI_SalesActivities, but when I select the OK button in the Logon form (previously I selected the database SAPDemo_US from the list box), the program show a dialog with the message:

Could not stablish connection!

Please check your Business One

The SBO Version is 2004 A (6.7)

WindowsXP Pro SP2

JVM 1.4.2_06

How can I run the samples?

Regards

Jorge