Try to run it in debug mode (see jLite manual) and attach a debug log.
Regards,
Oleg
Sorry for a long delay with reply.
Try to run you application with updated configuration for GILDA VO:
http://code.google.com/p/jlite/downloads/list
I added the new GILDA CA certificate, lack of which most likely caused the error.
Regards,
Oleg