Config problem 1und1 provider Germany

Hello dirk,
yes youre right, but 1und1 need´s the 49Number as Username.
My Problem is right now, when i call my Line, i recieved 4 calls on the localphone.

See here:
== Using SIP RTP Audio CoS mark 5
– Connected line update to PJSIP/1und1_privat-00000144 prevented.
– PJSIP/521-00000147 is ringing
– PJSIP/521-00000147 is ringing
– PJSIP/521-00000148 is ringing
– PJSIP/521-00000148 is ringing
– PJSIP/521-00000149 is ringing
– PJSIP/521-00000149 is ringing

What i do wrong?