BGP session between quagga and bird

How to establish BGP session between Bird and Quagga? I have two virtual machines created on FreeBSD. With a route server Quagga and another with Bird. But Bird did not establece connection with Quagga. I managed to establish session with a Mikrotik router but I can not with the route server Quagga. Does anyone know say what possible reason? -- Att, Mike Santos Farias Contato: (79) 9 8851-7565 (79) 9 8821-3108 (whatsapp)