Hello, On 11-02 15:59, Jaime Hemmett wrote: This probably means that the server is listening on <your_ip>:5060 and the bonephone tries to bind the same IP adress and port. Try to change port number either in ser or in bonephone so the server and the client will use different port numbers. mysql part of ser is used for authentication and user location persistence only. It means if you don't use mysql, ser will still work but you must have authentication turned off (which is default) and after reboot of the server registered users will be gone (which means that they will have to re-register). The server will work even without mysql. What is the problem ? Could you send us more information ? Network dumps would be very useful, you can make them using ngrep utility for example. Jan.