pullRefresh 下拉失效的问题

<div class="mui-content">  
        <div id="slider" class="mui-slider mui-fullscreen">  
            <div class="mui-scroll-wrapper">  
                <div class="mui-scroll" id="testscroll">  
                    <!--<ul class="mui-table-view">  

                    </ul>-->  
                    <p class="testp">fewajfweofaj waeofjowaeof wajoef jwaeofj oweafow e22222222222222222aofiwj eaofjwaoejfowaefowoeafj woeafjwiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiejfojwoefjwoiejfwef</p>  
                </div>  
            </div>  
        </div>  
    </div>  
    <script type="text/javascript">  
        mui.plusReady(function() {  
            mui('.mui-scroll-wrapper').scroll({bounce: true, indicators: true});  
            mui("#testscroll").pullRefresh({  
                down: {  
                    callback: function() {  
                        var self = this;  
                        console.log("下拉刷新");  
                        setTimeout(function() {  
                            self.endPulldownToRefresh();  
                        }, 1000);  
                    }  
                },  
                up: {  
                    callback: function() {  
                        var self = this;  
                        console.log("上拉刷新");  
                        setTimeout(function() {  
                            self.endPullupToRefresh();  
                        }, 1000);  
                    }  
                }  
            });  
        });  
    </script>

上是源码，实现一个简单的文本拖动显示，我下面注册pullRefresh实现以后，然后就不能正常拖动了，一拖动就是调用上拉回调，如果把 注册pullRefresh 去掉以后，一切都是正常的，有人遇到过吗？