Hi Janko,
If you didn't solve your problem yet but also otherwise I would recommend you to subscribe to GLASS beta by emailing to gssbeta@gemstone.com. There is a mailing list where you'll be able to ask for help.
Thanks a lot for your reply.
I did register at gemstone for a beta testing account. And hope I´ll get one in near future, probabply then I can solve my problem :)
Kind regards
Mark