Socket: Permission denied

Hello, I am setting up bird for my AS. I have two routers A and B and my ISP gives me a peer C to do bgp with. The first session initiate without any problem. but when I start the second one, I get the following error : zayo BGP master start 12:44:11 Active Socket: Permission denied debug doesn't give me more information and I couldn't found online what is this error. Could you help me understand it please :) ? And I had another question about router id, in the configuration file, it is said that the router id should be an IPv6. But when I put my IPv6 in it, I get the following error : bird: /etc/bird/bird6.conf:21:11 Router IDs must be entered as hexadecimal numbers or IPv4 addresses in IPv6 version Bests, -- shirenn