Toolbox JDBC on WDSCi verses Eclipse

I am trying to broaden my experience by using both WDSCi and the free version 
of Eclipse.  Thanks to help from this list, I can now use WDSCi to talk to a 
.Net SOAP service and update an iSeries database with returned data.  I have 
exported the java to the IFS and it even runs there!  I built the JDBC part to 
use the native driver (if it can) otherwise use JT400 driver.  When I import 
the java from my Windows WDSCi workspace into Eclipse and run it there, I get:

GSSException: No valid credentials provided (Mechanism level): Failed to find 
any Kerberos Ticket)

It doesn't cause the application to fail.  The JT400 driver successfully writes 
to the AS/400 database.  Neither the Windows WDSCi setup nor the Linux Eclipse 
setup authenticates to our Novell NDS domain, and we have no Windows domain.  I 
have tried setting the system property "useSubjectCredsOnly" to "false" (from 
the Sun website), but it doesn't eliminate the message.  Is there something I 
need to do in my Linux environment to enable Kerberos authentication?  Why does 
my Windows environment not require anything special?

John Dunn