Backbone.js - model.save() not firing a PUT request

I have a basic application using Backbone.js that is not making PUT calls (updating model). From the front-end, I calling a models save function doesn't make a PUT call; however, if I replace it with destroy, it does make a DELETE call to the back-end. Anyone have any idea what might be the issue? The function that is not firing a PUT request is the saveTask function.

App.Views.Task = Backbone.View.extend({
    template: _.template("<label>ID:</label><input type='text' id='taskId' name='id' value='<%= _id %>' disabled /><br><label>Title:</label><input type='text' id='title' name='title' value='<%= title %>' required/><br><label>Content:</label><input type='text' id='content' name='content' value='<%= content %>'/><br><button class='save'>Save</button>"),
    events: {
        "change input":"change",
        "click .save":"saveTask"
    },
    render: function(eventName){
        $(this.el).html(this.template(this.model.toJSON()));
        //console.log(this.generateTemplate());
        return this;
    },
    change: function(event){
        var target = event.target;
        console.log('changing ' + target.id + ' from: ' + target.defaultValue + ' to: ' + target.value);
        change[target.name] = target.value;
        this.model.set(change);*/
    },
    saveTask: function(){
        this.model.set({
            title:$("#title").val(),
            content:$("#content").val()
        });
        if(this.model.isNew()){
            App.taskList.create(this.model);
        } else {
            this.model.save({});
        }
    }
});