[Users] Problem with login on serweb interface

Hello there, I know the question may have been asked a lot of times, but I am really scratching my head with hat issue : I installed serweb to use with my openser SIP server. I followed the install procedure for serweb, and now I am facing a problem : I can't log on th eserweb admin page with admin / heslo. I have tried all the tricks I could see on the different ailing list discussions. I have tried to remove the domain's autocompletion and tried different possibilities by myself. Could you help me figuring out wher serweb stores the admin login information so that I can change it by hand and try to log in after that ? Thank you for your help Antoine