WebIm API登陆报错 EASEMOB_IM_CONNCTION_OPEN_USERGRID_ERROR

我使用WebIm API进行用户登陆，报错 EASEMOB_IM_CONNCTION_OPEN_USERGRID_ERROR
var appKey = '这里是appkey'
conn = new Easemob.im.Connection();
//初始化连接
conn.init({
https : false,
//当连接成功时的回调方法
onOpened : function() {
//handleOpen(conn);
},
//异常时的回调方法
onError : function(message) {
alert(message.type);
}
});
conn.open({
user: 'zyg',
pwd: '123456',
appKey: huanxin_appKey
});上面的代码触发了onError回调，alert显示type为3，我查了下源码对于的常量是 EASEMOB_IM_CONNCTION_OPEN_USERGRID_ERROR
求大神帮忙解决下啊