Using Boost::boost::asio::ip::udp from a model plugin

Hi everyone, I'm trying top use a custom UDP socket to control a model. The outgoing (from Plugin) messages are received but the plugins doesn't receive anything from the source. The messages are being queued. It's not the port because I tried to use the code outside gazebo and it works. Any idea why, and how to fix this? Thx! XB32Z