Hi list, Is there any major difference for www_authorize and www_challenge function in ser 0.9.3 and ser 0.9.4 ? When I am using ser 0.9.3, have no problem with the registration, but when I upgrade to ser 0.9.4 version, Most of the UAs failed to register, and the 401 rate is extremely high. Once I downgrade back to ser 0.9.3, then no more issue. I m using if (!www_authorize("voip","subscriber")) { www_challenge("voip","0"); break; }; The SIP_DOMAIN is set to voip Anyone facing this issue too? Thanks Regards, Chia -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.13.3/172 - Release Date: 11/15/2005