周K线订阅K线失败,,周期=1week,不支持的频率

 代码如下，订阅日线是可以的，周线不论是week、weekday、1week、1weekday都不行。。。请问老师是什么原因

SubscribeBar(symbol(),"1day",20120101);
 SubscribeBar(symbol(),"1weekday",20120101);