Dear All, I am new in SER and B2BUA, and I have a problem now UA1----SER----B2BUA----Freeradius | | UA2 It's OK when thu UA1 (or UA2 ) register in SER (step : ua1-->ser-->radius) but when UA1 calls to UA2 , there is a problme, ( step : ua1-->ser -->b2bua-->radius ) auth: No authenticate method (Auth-Type) configuration found for the request: Rejecting the user auth: Failed to validate the user. but i use the same account and password whit register anyone can help? John Hsu