Contact with organizators of PHP Conference in Amsterdam?

Hi, For a few weeks I am looking for contact to organizators of the PHp Conference in Amsterdam. I would like to register for conference, but I can't. During the registration phase one need to typ VISA number etc. This is odd to me, and my University want to pay just with a bank transfer. For a few weeks nobody answers to any email. I sent e-mails to: orga04a@phpconference.com info@software-support.com and then: fstepan@entwickler.com bjoern@thinkphphq.de I just need to register to have a paper that I have been registered, and I need a bank account number to pay the money before April 2. I tried to call by phone the Software & Support Verlag GmbH but the line was busy all the time. If anyone knows where the people responsible for the registration process for PHP Conference are, then please send me the info (could be by private e-mail). Best regards,