BIRD unable to read date from TUN/TAP device

Hi I'm trying to let BIRD communicate over virtual network devices created by the Linux TUN/TAP module. As it seems the tap devices receive the messages from BIRD. However, BIRD does not seem to receive the messages sent to it over the tap device. I described the scenario and the issues I run into in more detail on stackoverflow. If somebody has some experience with running BIRD over TUN/TAP devices, please take a look here: http://stackoverflow.com/questions/21001713/linux-tun-tap-unable-to-read-dat... Much thanks to anybody that can provied me with some insights into the issue! Best, Cyrill