After 10 minutes i get these debug messages :
SIPSTK : 209819:[sess]:bbba04 FailureResponse-end Transaction in RegisterSessi
on
SIPSTK : 209819:[ua]:UA: Registration failed – no action taken now..
SIPSTK : 209831:[ua]:Received Sip Iuca Message: 0x3b
SIPSTK : 209831:[ua]:Session identifier (call-00B5F489-96E1-D911-0006-1)
SIPSTK : 209832:[ua]:Received Sip Iuca Message: 0x3b
SIPSTK : 209833:[sess]:bbb404 FailureResponse-end Transaction in RegisterSessi
on
SIPSTK : 209833:[ua]:UA: Registration failed – no action taken now..