[Serusers] Newbie question: Registration problem

Hi folks! It is couple of days I am struggling with a problem to get SER up and running. I want to run it under SUSE 10.1 in the first instance simply without MySQL, RADIUS etc. - I am using the SER distribution 0.9.6. To my problem: actually, I can start SER and I get the information as follows: ------------- Listening on udp: 127.0.0.1 [127.0.0.1]:5060 udp: 169.254.158.130 [169.254.158.130]:5060 tcp: 127.0.0.1 [127.0.0.1]:5060 tcp: 169.254.158.130 [169.254.158.130]:5060 Aliases: tcp: localhost:5060 udp: localhost:5060 -------------------------- The locally started client X-lite registers with SER without a problem (command ./serctl alias show confirms this). However, it is the only one who registers - all other (HW phone snom360 and other soft clients on other machine) send their REGISTER messages, but there is no answer from SER (and no ICMP messages from the machine, what is normal and OK!). In the ethereal trace it may be seen that SIP REGISTER messages are coming to the machine and there is no answer. I would appreciate any hint where I can look to see the problem. Best regards, Mato