SetBillStatus审核不成功

//保存
Kingdee.BOS.ServiceHelper.BusinessDataServiceHelper.Save(this.Context, dynamicObject);

//提交
string id = dynamicObject["id"].ToString();
Kingdee.BOS.ServiceHelper.BusinessDataServiceHelper.Submit(this.Context, businessInfo, new object[] { id }, "Submit");

//审核
List> lstKeyValuePairs = new List>();
KeyValuePair keyValuePair = new KeyValuePair(id, "");
lstKeyValuePairs.Add(keyValuePair);
Kingdee.BOS.ServiceHelper.BusinessDataServiceHelper.SetBillStatus(this.Context,
businessInfo,
lstKeyValuePairs,
null,
"Audit");

代码如上，保存提交都没有问题，审核也不报错，但是执行完后数据状态是审核中，而不是已审核，貌似看起来审核的代码没有生效的样子，请教各位大神！！！