Can you check my settings? In Native OS2008 SIP client I have : 1747xxxxxx@proxy01.sipphone.com as a UserName My Gismo password as a password ( I can login to my account on gismoproject.com with these credentials) Under Advanced button - on the Connection tab I have: Transport -Auto Outgoing proxy - fwd.pulver.com - came from IPKall Port 5060 Discover public address - checked Keep-alive mechanism - Auto Keep-alive frequency 0 Authentication tab Authentication user name - blank Password blank (Not sure what should I put here) On STUN tab Auto-detect STUN - checked The first problem I have - my account can't go online.