Castle框架中HQL更新的一个很简单的问题 【高分求助】

[vvlovevv]

关于Castle中HQL更新的一个简单问题，怎么老是出现这个异常：
Could not perform ExecuteQuery for WashedCashmereInventory
我刚学习这个，不怎么懂，也是照葫芦画瓢，希望高手指点，代码如下，谢谢！！

 static void AddNumByPihao(string Pihao, string Chandi, double Inventory, string PositionID, string JigouID,string PType)
    {
        object[] param = new object[6];
        param[0] = Inventory;
        param[1] = Chandi;
        param[2] = Pihao;
        param[3] = PositionID;
        param[4] = JigouID;
        param[5] = PType;
        SimpleQuery q = new SimpleQuery(typeof(WashedCashmereInventory), "update  WashedCashmereInventory  set Inventory=Inventory+? where Chandi=? and  Pihao=? and  PositionID=? and JiGouID=? and PType=?", param);
        ExecuteQuery(q);
    }

先谢谢！！！

[vvlovevv]

高手在哪？？？？