something is wrong when I send a UDP message

result

#I am running om Mac OS X 10.6.8

#I try with node 0.4.9
Version: v0.4.9
listening event fired
buffer created: my message is hallo world

#I try with node 0.4.9
Version: v0.4.8
listening event fired
buffer created: my message is hallo world

UDPdebug.js

console.log('Version: ' + process.version);

var dgram = require('dgram'),
	path = require("path");

var server = dgram.createSocket("unix_dgram"),
	datagramPath = path.join(process.cwd(), "datagram_socket.udp");
	
	server.on("message", function (message) {
		console.log("message event fired");
		console.log("UDP got: " + message);
	});
	
	server.on("listening", function () {
		console.log("listening event fired");
		
		var buffer = new Buffer("my message is hallo world");
		console.log("buffer created: " + buffer.toString());
		
        server.send(buffer, 0, buffer.length, datagramPath, function (err, bytes) {
        	console.log("send callback fired");
            if (err) {
                throw err;
            }
            console.log("Wrote " + bytes + " bytes to socket.");
        });
	});
	
	server.bind(datagramPath);