我的程序有问题。这是一个关于地理信息系统的程序，使用了LeatlefJs库，我还使用了letlef路由机功能。问题是系统无法显示它应该能够显示的路线，我不太明白。这是脚本。

function getDirectRoute(index, callbackFunction){
            var dari = marker_awal.getLatLng().lat + "," + marker_awal.getLatLng().lng;
            var tujuan = markerCabang[index].getLatLng().lat + "," + markerCabang[index].getLatLng().lng;
            $.ajax({
                  type: "GET",
                  url: "http://localhost:8989/route?point=" + dari + "&point=" + tujuan + "&points_encoded=false&instructions=false&vehicle=motorcycle&ch.disable=true&weighting=shortest&algorithm=alternative_route",
                  dataType: 'json',
                  contentType: "application/json",
                  success: function (data) {
                    successReveived++;
                    var coordinates = data.paths[0].points.coordinates;
                    tempDistance = 0;      
                    for(var j=0; j
错误是这样的
无法加载资源：net::ERR_CONNECTION_REFUSED http://localhost:8989/route?point=3.611967691620835,98.67254734039308&point=3.611126,98.67548&points_encoded=false&instructions=false&vehicle=motorcycle&ch.disable=true&加权=最短&算法=alternative_route