Username and passwords are not accepted

Hi everyone! I was successful in installing the sneak preview for SAP Web AS Java SP9. However I was not successful in displaying the J2EE system as well as the portal. The documentation says that whenever I am prompted for a username logon I should use Administrator and the master password that I entered during installation. However, the server does not accept these values...please help! =)

Generous points will be awarded to those who help!

Thanks!

Alex